On project I used to follow quite a bit was the RT request tracker.
They moved to discourse some time ago. The end result was that email
became a mostly useless stream of context free messages and you
basically have to open a browser to follow a conversation. Offline?
Too bad. High latency connection? Too bad. I don't bother even
attempting to follow that project any longer.
I don't expect to sway anyone's opinion or that Fedora will keep mailing
lists around just for me. But in this push for some nebulous
"engagement" I believe there will also be disengagement, and that by
doing this Fedora itself is making a trade.
While I'm not a contributor to these lists, I do follow them
and have so for probably 20 years now. Like Jason, I have had
other projects move away from mailing lists, and that now means
I have to make a concious effort to 'poll' their system, rather
than having a push notification. Needless to say, I don't follow
them any more, and I don't know what's happening there.
Push means I find out whenever something happens.
If nothing happens... then that's OK with me, I'm not bothered.
But to be constantly polling for 'is there anything new... is there anything new'
(whether there is or not), is just plain inefficient.
I hope that doesn't happen to Fedora too.
[Just my 2 cents worth.]