I found/started using personal streaming solutions around 8 years ago; so post-Emby/MediaBrowser split into Jellyfin.
While I started with Plex, I very quickly came to despise their always online/centralized authentication system and moved to Emby as the only alternative I’d seen/heard of at the time. From there I learned of Jellyfin and (at least some of) it’s origins; though I’ve had 0 reason/need/desire to actually install Jellyfin as Emby works fantastically.
I’ve been really quite happy with Emby; particularly with their stance of not tracking/collecting userdata and maintaining Emby as a private company focused on their customers instead of investors/partners. I understand some people don’t like the Premiere licensing model they use; but I think it’s a good way for the developers to ensure stable income for their work; and TBH, especially with the lifetime purchase option, I think it’s undervalued. Unfortunately that model is not compatible with opensource (as users just fork it to remove the paywall), which is why Jellyfin exists from what I understand.