It’s bug fixes! But they make some significant changes without asking - and a lot of people dislikes this, and they doesnt’t care about them.
Nuendo look doesn’t significantly changed since version 2. And now we get this in N10.
Undo function is terrible. Auto-save is still terrible. I work on huge projects and I know what is 30 seconds autosave. etc etc
And by the way - every final version they made was left off with a lot off bugs, that would be never fixed.