[Arathorn]

Under the hood, spaces are rooms - and we made the decision to keep using a # sigil to refer to them, given the act of joining and being invited and having multiple aliases etc is the same as a room. When you say “hey, come join #community:matrix.org” does it really matter if the thing you are joining is a room or a set of rooms?

That said, it’s subjective, and we went back and forth on it. My original proposal had a twigil of #+wherever:example.com, which in retrospect was daft. I think it was a member of the community who proposed just using plain # aliases - hard to tell given https://github.com/matrix-org/matrix-doc/pull/1772 is so heavily commented that it crashes if you expand the comments :/

[zamadatix]

Sorunume suggested just + then later Alch-Emi made the case for just #.

https://github.com/matrix-org/matrix-doc/pull/1772#discussio...