Stagnant? That's one way to call it.
Another is dead in the water and going nowhere fast.
In all honesty, talk is cheap, and this thing has been going nowhere for a LONG, LONG time.
There are fixes and features to bring it up to a vaugly competitive point that have been outright ignored by developers for many years.
Now, out of the blue they expect us to believe they want to throw money at it to actually improve it?
Where they not at one stage considering tossing Thunderbird to someone else so they can concentrate on Firefox alone?
But now they're keeping it and claiming they're going actally *improve* it?
I don't know if there's going to be any breath-holding over this, but it's not going to be me.