Statistically speaking there is no successfull major launch that spent over 2 years in EA. Games are usually launched in EA for tweeking in the last year of development, this includes DOS2, which by then was an indie title.
I'm worried that for over 1 year of EA they've advanced very little, that with a massive 400 person team.
I can think of few, but yes, Baldur’s Gate3 isn’t exactly Prison Architect.
In its “family” of games and “alpha build” style release (small bit of game for testing, while dev work on the rest) BG3 is taking longer, but honestly every game I can think of (Pillars of Eternity1&2, D:OS2, Owlcat games) would be better off if kept in the over for another year or so.
I don’t expect we will see majority of work that Larian has done in EA period until 1.0 drops. If BG3 will be good at launch - that’s really all that matters.