2024 Polymorph Rules Phrasing

Okay, so question about Polymorph. 

Simple version: Can a barbarian rage while polymorphed?

Complex version: 2024 Polymorph states "The target’s game statistics are replaced by the stat block of the chosen Beast, but the target retains its alignment, personality, creature type, Hit Points, and Hit Point Dice." This implies to me the loss of all class abilities, is that correct? I know as the DM I can always say "Rule of cool", but still wanted an actual RaW answer.

Thanks in advance!

Perfect, that's what I'd thought, thank you.

I agree with wagnarokkr. I just wanted to add an example for comparison in the wording:

Game Statistics. Your game statistics are replaced by the Beast’s stat block, but you retain your creature type; Hit Points; Hit Point Dice; Intelligence, Wisdom, and Charisma scores; class features; languages; and feats. [...]