My Mac Pro 2007 (1,1) is being a bit flaky. It usually works fine but occasionally it doesn't wake from sleep, forcing a restart, and today I got a kernel panic. Also, I often get irritating fan noise too because my other RAM went bad so I was using my backup server RAM which doesn't have the right heatsinks.
I've now replaced the Mac Pro with my 12" 2017 MacBook. I laugh at M1; I'm running m3.
It's running in clamshell mode and outputting to a 30" Apple Cinema HD Display. Overall performance is quite decent but it will bog down somewhat if I play an HD YouTube (VP9) video at the same time as heavy multitasking. Fortunately, I do have 16 GB RAM so it's probably better than it might have been. Since I'm running an external dual-link DVI monitor and I need a fair number of USB devices for my work, I'm doing a lot of dongle/hub daisy chaining. Dongle Life™. Remarkably, it all seems to be working fine so far, including with my bus powered USB thumb drives. I was a little worried about heat, but besides YouTube and a bit of other video playback, I'm using mostly just business applications so the MacBook only gets mildly warm. And the silence is wonderful.
Eventually I'll have to get an M2 or M1 Pro Mac mini though.