expressjs v5 release date?
At the moment, there no finite date for Express 5 release. Express 4 is pretty stable, so we are in more of a maintenance mode while we await finalization of HTTP/2 in node core among other things.
There is a bunch of stuff planned for Express 5. Some of them have been completed, but we'd want something major like HTTP/2 or promise support before we ship Express 5.
You can actually use HTTP/2 already with Express.
FYI, Express is now a part of Node.js Foundation. It does not belong to StrongLoop/IBM.
And, by the way, we have an active Gitter channel.