- if a mailing list user want to reply to a message on the forum,
he must subscribe/use the forum
Note that this is already happening with some things being discussed
both on the forum and on the mailing list without the requirement to
post it there.
This has also been the norm until now with people writing on the wiki
and other on the mailing list and nobody ever complained.
But the proposal is not about this, the proposal is about letting the
people who are using the forum and not the mailing list know about
proposals that are being made.
Since, as you say, the community will be split among the two
communication channels, I don't really see why the people using one of
the two should be favoured and naturally included in updates about
tagging and the other ones shouldn't.
_______________________________________________
Tagging mailing list
Tagging@openstreetmap.org
https://lists.openstreetmap.org/listinfo/tagging