If you can log into the site, it’s done.
If you try to access the site and you get a “startup log” page, it’s still ongoing (and it will show you there what it’s doing).
https://jellyfin.org/posts/jellyfin-release-10.11.0/#startup-ui-and-log-viewer

I think the feel from the Devs is that there isn’t enough new functionality to justify the major version bump, this primarily being a reimplementation of existing features.

BUT, I agree with you, it should definitely be V11 under the semantic versioning scheme.
Whilst there is a migration path here, the database changes under the hood alone are likely to break backwards compatibility with all plugins (with in-house plugins being upgraded in sync).
Such breakage is kind of the defining characteristic of a MAJOR version.

This is fantastic.
Tradie doesn’t want to be watched while they work.
I want to learn by watching, so I’ll hire someone else.
We both get what we want.

Funnily enough, I’ve got a few friends who are long time iPhone users, who actually point this stuff out themselves:

“OMG! Have you seen the eye watering price of the new one?”
“Yay, I finally get stuff you’ve had for years.”

Neither party would ever consider anything else, and they both buy the new model every year. 🤷

At this point I admit that my reasons for choosing Android all those years ago no longer exist or matter, but I can’t imagine changing ecosystem either.

Us oldies being able to parse it, just means that it is now out of date. ;-)

Crinj fr fr.