When some muas announced Autocrypt support a few years ago I got excited again, but unfortunately nothing came of it. I havent been able to auto-update my key on my partner's mua, it seemed 'support' meant different things to different projects but none focused on the goal: making PGP encrypted email usable (and more secure).
There was a year or two where I actually began to receive autocrypt headers from random people and started encrypting with them.
Unfortunately, this momentum was completely killed by thunderbird, who decided to remove support and proceed to reimplement traditional manual email encryption :(
