Re: everyone is using webmail
I wish you were correct, but just because a few sane people are still using real email does not mean that everyone else is. The figures in the article show that web mail is bigger than real email and that's why Thunderbird want a slice of the action.
My wife teaches IT to beginners and for them email = web mail, and that means ISP web mail or Gmail, no one else uses a real email client, even though my wife and I do, and we encourage people to do the same. Last week someone even joked about Firefox and Thunderbird along the lines of "they still exist?" because Google and Chrome dominate so much.
For me web mail is a last resort and I use real client/server email most of the time but I'm in a shrinking minority. Amongst many other people chat platforms seem to be super common, Teams has become a lot more ubiquitous at work, and with my clients Google Chat or Teams is now more common than email for a lot of things - because it's instant and you can do a call with screen share at short notice. I'm not saying that any of this is efficient or better than email and structured meetings - far from it - I'm just saying they seem to be far more common. What's up and Signal etc are also super common and email seems to be withering by comparison.
I'm not advocating webmail or using a chat platform instead of email in any way, shape or form, I just think the battle has been fought and real client/server email lost.
I even refuse to top post in my personal emails, but I long ago gave up that battle at work, no matter how insane top posting is and how incomprehensible it makes reading emails... Things change no matter what you or I think, and not always for the best.