The head of BitWarden has come out and stated the SDK being required to compile BitWarden was a mistake, however, and if this proves to be true (which I have no reason to doubt) then I see no reason why any of this is an issue.

I don’t see why this should make any difference at all. Sure, I get why he is are saying they are going to fix it - he thinks that this gets them in compliance with the GPLv3. But from a practical point of view there is no difference at all. The software is useless without that SDK part. Even if it does indeed get them in the clear from a legal point of view (which I am not convinced that it actually does), it is still a crappy situation.

I think, it would look way less shady, if they said they are going fully source-available and not pretend that they are keeping the client open source. I would still dislike that, of course. At least that wouldn’t have eroded the trust in them as much as it did for me.