Being able to quickly write replies to email, real actual email, was very valuable. That was the core of what drew me to Delta Chat.
There are plenty of proprietary email apps set up around that feature but in the free world, not so much. Delta Chat was it and it was a gem because it was in many ways better than those other sparks and spikes and whatever they were called. Not to mention the incredible leap of faith it takes to go for a proprietary mail app since they can read the emails.
Delta Chat is rapidly moving away from being usable for that. If someone forks it or finds a good alternative (that’s FOSS, obvs), I would love to know.
I know I’ve worked a little on Notmuch, and I’ve talked a little bit with the people who make aerc, but for all their conveniences they’re still traditional mail apps where the threads look like files that you have to open up and enter into and work with. The few extra clicks involved with using a normal mail app might sound like no big deal but it really adds up. All the opening, searching, archiving, threads management… Whereas with Delta Chat in its prime, you just see the message right away and can reply right away. Easy peasy.
Maybe K-9 but it got bought out by Mozilla and they hate autocrypt which I don’t. I think WKD is better, sure, but I try to use both. K-9 used to be one of the best autocrypt clients out there.