I've replaced the big, aging Synology with a $100 Mac Mini (2014). So far it's great. Running Plex, Roon Core, Syncthing, and Tailscale so far. I understand the software and it will be inexpensive to replace if needed. External drive for storage and Backblaze for offsite backups. It's a much calmer solution for me because I don't fear something breaking and having no clue how to fix it.