I'm not sure I'd make that assumtion. Google workplaces makes a lot of revenue. $20/user/month * 100k users in a large company is 24MM/year. I'm sure GCP will grow faster, but Google workplaces has had more market penetration for longer.
The problem I think is that, little by little, users start stepping outside the Google bubble and they start to realize that there's clear benefits. I used to be a 100% google person, then we started using dropbox paper for documents, notion for company wiki (and personal notes too), tandem for video calls.
In 2022, our company is using Google only for email, calendar, and sheets. Two years ago we'd be crazy to even think about that. We're up to the point were it wouldn't seem crazy to go with the Microsoft suite, to be honest.
I think for a lot of companies not going with Office is crazy, Google docs isn't good enough, and who's wants to have 7-10 different suppliers for different products (email, calendar, sheets, docs, presentations, wiki, chat, video). Far easer to just buy one cohesive system.
There is probably an opportunity for one of the larger players to acquire the others and move back towards a cohesive platform. There would be push back but I suspect it would pay off. Imagine Airtable, Notion and Slack under one operation.