But even with an immutable distro you don't have to reboot. The updated image just gets downloaded in the background and booted into when you restart. There is no harm in still being booted from the old image id you don't specifically need anything only included in the new one. Nothing forces you to reboot.
Silverblue is my daily driver. Everything is in flatpaks, which update automatically, or in distrobox which I have a bash script that updates automatically.
System updates download in the background and just boot automatically the next time you boot up. I just ignore them.
I'm using the KDE version and updates come in automatically through Discover. They almost always announce in the system tray that a reboot is required.
You also don't have to reboot when Discover says to. It's just saying that the updates won't take effect until you reboot. It could probably be worded better, for sure.
sigh... i hate to say it but do your updates via command line because it will actually tell you if you need a reboot. As said above, it should only be for Kernel updates, and even then it will tell you that it will switch kernels next reboot and keep running on the current one.
Most desktop applications for doing updates ask you to reboot not because its needed, but because they are being "safe" or not running with the same user rights as you are in the terminal.
If you're using KDE, you can go to System Settings > Software Updates and
Set the notification frequency to weekly or monthly to reduce the number of update notifications.
Disable offline updates. This will install updates while you're using the system and you can choose to reboot when/if you want.
Opening Discover will check for updates and, if updates are found, show the tray notification regardless of your notification frequency and when you last updated.
Fedora does roll out updates pretty much daily, which can be annoying, but you can choose what and when to update.
Dude just change discover's update mechanism in the settings. Discover usually reboots to install updates so that nothing goes wrong. You can change it though, so that updates are applied instantly. That way you'll only need to reboot for kernel updates.
Everything gets updated in the background without even needing intervention, not even a "you need to click here to download and reboot to apply changes"-notification.
I shut down my PC every few days when I leave the house for longer and boot into the next base-image without even noticing.
And if I do because something doesn't work, I just select the image from yesterday.
Oh yeah, and 99% of my apps are Flatpaks anyway, which auto-update too by default.
I just don't notice my OS in any way, I just work with it. Lovely!
It isn't, though. Made that way, I mean. I update maybe weekly and restart my system when I do. That's it. I seldom get notification that I need to update unless I open the Gnome Software app, and unless it's a security update, it's not imperative to do it just because it's there. And even then, it doesn't always require a restart.
I've been using Fedora off and on (mostly on) for the better part of a decade, and I've never run into what you're describing. So no. It isn't "made that way." I imagine if it were, it would be a hell of a lot less popular.
I am using Nobara, which is a Fedora based gaming distro. I definitely do not have to reboot for updates to software outside of system updates to the OS specifically. Updating Discord, Firefox, Steam, Heroic Launcher, Signal, etc does not require a reboot. Something sounds amiss. I am running straight Fedora on my Surface Pro and same story there, basically restart for system upgrades only.
Yeah, this is one of the reasons I don't like Fedora. The other reason is because they are owned by Redhat/IBM who are best buddies with the NSA.
I prefer Ubuntu or Debian based distros as well as opensuse. I'm using Linux Mint because it's developed by independent Devs and is Ubuntu based but with all the Snaps stuff stripped out.
It's ideal. Fast, beautiful, reliable, stable yet can do everything Ubuntu can and has all the latest security patches and Ubuntu improvements.
They also have a Debian based version if you want to be Debian based but run Cinnamon.
I've been using Linux for years and IMO it's the best distribution overall.
But opensuse is also great, and fully independent. And super reliable. They have 2 variants:
Leap: this is their long term version which only gets a total upgrade every 2 years. It does get security updates and fixes but the main upgrade is every 2 years. Super stable.
Tumbleweed: this is the rolling release which gets updated with all the latest packages, fixes, security etc daily.
Also super stable unless you have a proprietary WiFi card from Broadcom. If you do, WiFi will break often because the guy who makes the WiFi driver has to update the driver after opensuse updates Tumbleweed. He normally needs about 2 days to fix it but if you don't have ethernet, you'll have to tether your phone to your pc to use the internet and download the fix. Can be a pain.
There are tons of Ubuntu based distros around so try a few on a live usb. Go to Distrowatch.com for a comprehensive list of all distros. Use the filters to find what you want.