2 - 8 watts of power for a Pi vs 9-150watts for an x86 system. There are definitely use-cases.
I use a Pi for DHCP, DNS with PiHole, Tailscale Subnet Router, Rustdesk server, Vaultwarden, Syncthing (connects to local device shares, rather than run ST on each device), ArchiveBox, and working on instant messaging (maybe SimpleX, not sure yet). It’s kind of maxed out.
But all this runs under 8watts (actually it’s so low my smart switch doesn’t even register the consumption).