I can't agree more. I have had the same setup for over 10 years, a PC in the garage running Ubuntu with lots of ram. I just upgrade it every so often with last

I can't agree more. I have had the same setup for over 10 years, a PC in the garage running Ubuntu with lots of ram. I just upgrade it every so often with last-gen CPU and motherboard and swap-in the RAID controller. I script all of my dev environments, if I need a K3S cluster it's literally 2 minutes (Bash, Python and some Ansible). Want a set of RHEL machines? No problem, it's another script and 30 seconds. For training you can't beat it. If I have to get out the "big guns" I have an old Dell tower server with 128GB of memory that I got cheap and has 12/24 threads. Sure it's a power-hog but I use it surgically. Pis are great and you get a nice, limited blast-radius but the SD cards go wrong, they are slow at single-thread and they don't really have enough memory (Pi4 4GB being an exception). You can't beat x64 for compatibility either.