I found that running just a NAS is no good because it lacks performance. And running just a server is no good because of data safety. So I run both.
I run a Synology NAS for storage, and an Ubuntu Box for services (Paperless, Mattermost chat, Photoprism gallery, Gitea for Code, picoshare, and lots other small stuff). All services run on Docker (plus Portainer for handling them, plus NPM for certificate handling and subdomains).