Verdict: Yes
Yes. Plex publishes a Linux desktop app on the Snap Store, and Plex Media Server has Linux builds too, so both halves of a Plex setup can move.
Plex supports Linux at both ends. The desktop player is published by Plex on the Snap Store, and Plex Media Server, the part that holds your films and shows and sends them out, is offered for Linux alongside Windows, Mac and a long list of network drives.
Your account and library come with you. Watch history, playlists and the way your collection is organised are stored by the server and your Plex account, so signing in on the new machine brings everything back.
If the machine you are switching is the one running the server, the move is still fine, but plan it rather than rushing. Copy your media drive across, install Plex Media Server for Linux, and point it at the same folders. Plex has its own instructions for carrying the existing library database over so you do not lose watched marks.
There is also a Plex listing on Flathub. It is put together by the community rather than by Plex, so the Snap Store version is the one to prefer.
Plex's own Linux desktop app, published by the company. Same account, same library.
Your files: Your media files are read where they sit. Watch history and playlists live with your Plex account and the server.
A local media centre with no account and no server. Good if you only ever watched on the one computer and did not need Plex on a phone or TV.
Your files: Reads the same media files, but builds its own library and does not know your Plex watch history.
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