At the ends of the day, it’s about what you’re comfortable working on. My daily driver is a MacBook Pro. I have a BeeLink S12 Pro that runs most of my self hosted stuff, and a Synology that runs a couple things. I also have an HP Z440 as a test bed box (powered off unless I’m working on something). I’m comfortable working with Linux and power draw was important for me in setting up my always-on server (my power bill is already high).

The only minor concern I would have with a mini is you’re limiting your support base. This isn’t to say there’s no support, there’s just less. Most self hosted are using something like a unraid, a beelink, or an old micro Dell/HP/Lenovo. Because of that, there’s a ton of stuff out there about getting various services running on these setups. The M-based mini environment is going to be a little more unique.