I’m glad I don’t need computing power then. It just runs a webserver, 2 databases, mail environment, puppet master, icr client and some random stuff I just start and forget.
It does the trick here and it and it’s predecessor Rpi3 and 2 managed, are quiet and enough for here. Both 3s boot from microsd and run from USB SSD for the OS, data is on nas. All are stock, no extentions, apart from an extra USB nic on my firewall. (Somehow having 2 different physical interfaces sounded preferable to me for a firewall)
The old 3s are now interface for my smart meter and a domoticz system.
BTW I see the Thinkcenter you mention for €250 online, My RPi4 cost me as kit €108 (8GB version). That was before all prizes went trough the roof though, as I see the separate board now for €125.