This is for me, large city dweller with no basement or a place to tuck away a noisy server with fans. In fact, I already have something like this, with older specs, produced by no name Shenzhen company, tucked away under the couch and hosting a bunch of services.
I live in a tiny village with a shit ton of space for anything, but would prefer this over a power hungry server anyway… At least until i fill part of the barn roof with solar panels.
“Under the couch” is a literal statement. This is a modern, not traditional couch, so its legs are raised maybe 10 inches? Gives some room for access and passive cooling.
For me specifically: wireguard, strongswan (ikev2 vpn in iPhone), freshrss, paperless ngx, webdav server for iOS apps like genius scan and photosync, filebrowser for web access, archivebox, wallabag, airsonic, gitea.
Not the person you are replying to, but I host my local dev environments, HomeAssistant for various home automation tasks, Unifi controller, Paperless-ngx, Jellyfin media server, NAS and cloud backup of PCs, adguard, and occasionally some game servers for friends. There's a tremendous amount of self hosted software available for about any purpose you can think of though.