SSHFS is very mature. I use it for administering several home servers.
It works so well that they added a mode where some users can have SFTP only access (without SSH shell) so you can set up shared directories. It was easier to set up (for me) than CIFS or NFS.
Jellyfin depends on proprietary Microsoft .NET, even on Linux.
It’s still better than Plex and Emby, which are fully proprietary, and have no source code. But I will stick with sshfs with kodi, and nginx plus mpv for now.
ydotool is missing a lot of features. It emulates an input device, so it can only send inputs to the active window. xdotool can send keystrokes to non-active windows, and has features for searching for a window to send to. xdotool can minimize, dismiss, or move windows around.
I’m aware of newton. It’s a work in progress, though, and doesn’t have as many features as X11 accessibility has. Although it might have enough features eventually, I worry that X11 will be deprecated by operating system vendors before that.
I worry about Wayland for the features it drops from X11. Wayland will never have xdotool support, due to its security model. I worry about onscreen keyboards for drawing tablets and screen readers for the blind.
Windows used to be easy. Now, it’s so obscure and locked down that only Microsoft can maintain your computer. And they maintain it for their own benefit, at your expense, with mandatory ads and lockouts.