Purple Cat with a PC-98 (and X68K) (npub1f8l…7frq) Pleroma and Nginx, as well as a firewall. There might be other things but I don't exactly recall; not that they'd be demanding or important regardless.
What's weird is that it's able to run those without a problem (my Pleroma instance feels responsive), just some stuff like SSH logins, launching certain programs, running Neofetch or even just doing a "systemctl status" takes a while.