I don't know about that... unless a good open-source option comes out for corporate email that matches what Outlook/Exchange/M365 offers for calendars and scheduling.
That last part is the real point of integration... then real time chat and messaging status baked in... it's hard to beat. You have services and applications that offer pieces, but none integrate as well.
In the early 2010's I think that both Blackberry and Mozilla had an opportunity to create their own competition in the space and neither did. Google is pretty close, but IMO still a much lesser experience, reinventing a new chat app every other year didn't help their cause at all.
Google seems most likely to capitalize. GSuite is standard practice even among many large companies provided they were founded in the past ~15 years and aren't on the Microsoft teat. Their search is also _so much_ better than Outlook that it's even more useful as a forever-store.
I'm not disagreeing with the search aspect.. I will say that GSuite still doesn't do as well for calendar/scheduling integrations, or messaging beyond email for that matter... it used to, IMO, be as good for interactive messages before they nuked Hangouts in favor of whatever of the half dozen incompatible corp/public chat apps they've had along the way.
When Hangouts had integrated Google Voice and SMS in the app, imo, that was peak poweruser useful.
That last part is the real point of integration... then real time chat and messaging status baked in... it's hard to beat. You have services and applications that offer pieces, but none integrate as well.
In the early 2010's I think that both Blackberry and Mozilla had an opportunity to create their own competition in the space and neither did. Google is pretty close, but IMO still a much lesser experience, reinventing a new chat app every other year didn't help their cause at all.