I used RPi's for years for little stuff like DNS and file sharing and when I b it the bullet and got a surplus DELL SFF office PC things just started working a little bit better.
yeah, docker images and the like are supposed to be platform intependent, but there's 'supposed to' and 'is'
Running Ubuntu (and later Proxmox) on it just worked a tad bit better. I was into it for about $160 (purchased from Microcenter)