I'd still disagree. Want to share an image? Put it in ~/www/. Want to share a video? Put it in ~/www. Want to share some music? Put the .mp3 in ~/www. This core idea, that you can share files simply by using a file system, makes many of these extremely complex tools that require containerization due to their rapidly changing deps... overkill. Cargo cult. An impediment to the actual goal of just showing people things. There's almost nothing simpler than using your mouse to drag a file into a folder or $ cp etc etc.

As for hosting your own Matrix homeserver, sure, that's such a heavy and over-complex protocol that changes rapidly and uses libs that change even faster. You'd want to containizer that.... and probably give it it's own computer instead of your desktop or an SBC since it's going to take a lot of system resources.