The biggest problem I have with something like this is that unlike SO the answers aren't archived for others who may have the same issue. It would be nice if discussions like this on Gitter could be archived and searched the way mailing lists are.
https://gitter.im/gitterHQ/gitter/archives/all https://gitter.im/gitterHQ/gitter/archives/2017/06/14
I agree that chat isn't as digestible as SO, but it is definitely archived.