btrfs + snapraid: good idea for homelab?

Hi!

I'm about to upgrade my homelab from a RAID1 with two 8TB drives to a new one with two additional dives. I mostly use my homelab for Nextcloud (Documents, photos, audiobooks, ...), media storage, jellyfin and whatever docker container I think would be cool to self host.

Since data availability is less of an issue for me and Backup Space is limited, I'm thinking of ditching the RAID in favour of btrfs and for additional safety: use one of my 8TB drives as a Snapraid parity drive. At least for the personal nextcloud data - I can get the media files from elsewhere in case of data loss.

However, tutorials of btrfs with Snapraid are a bt thin on the ground and with this being my first time using btrfs, I'm a bit hesitant. Some people suggest MergerFS with btrfs + snapraid, but I fail to see the advantage of MergerFS with btrfs.

So... is this actually a good Idea? It seems to me that this would be a good tradeoff and I could wait a bit before the next time I need to buy a storage upgrade.

Thanks in advance. :)