For me there's a profile picture in the top right that opens an account dialog, from where a single tap switches to any other account. Do you mean something beyond that?

Chat is now built into the gmail app which is much easier to switch on.

I see Meet, but not Chat, and none of my Chats show up in the Gmail app (iOS), and there's a separate Chat app (which doesn't do the account switching I mentioned).

If Chat is built in, I don't see it yet.

My app has mail, chat, rooms, and meet tabs at the bottom.

I have Mail and Meet.

Makes it more difficult to switch between Gmail and Meet though (to look something up while in a meeting) since they are now conjoined into the same app.

I can understand Facebook or WeChat building everything into the same app, making the app into an inner platform within the platform, but when Google already control the outer platform it doesn't make much sense.

So, just like Google Talk / GChat was in GMail back in 2005? We've finally come full circle.

Isn't the mobile GChat integrated in the Gmail app?