The new forum may be also more capable of handling large volume of
posts - you can
easily mute threads and entire categories.
It's also possible to subscribe to only the first post in a category.
Thus, you may set to be notified whenever a new proposal is posted and
only then choose if you're interested in such thread and subscribe to
the replies.
If you're not interested in the proposal you have to do nothing: you
receive the notification, read through whatever is proposed and close
the web page.
Which is much better than filtering/muting threads on an email client
for several reasons.
I do believe that if proposals were being announced on IRC all this
time, we would now be extensively discussing about the major advantages
of IRC over forums.
For reference: https://xkcd.com/1782/
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