I have used the Raspberry Pi 4B as an openwrt router and I'm thinking of doing the same in a project. The Pi 5 is available but the 4B is still cheaper. Which would you recommend getting?
Do you use it with a single network port or do you add interfaces, via USB? Wasn’t there a performance limitation at least on the USB ports? Maybe the 5 has better specs here?
Did you look into GL.inet routers? The have OpenWRT under the hood? At their web shop cheaper than at Amazon.