Yep. Companies sign up for O365 and then the bean-counters insist on killing any other products that can be replaced by that (if you squint hard enough) because they see it as cost savings.
It’s not about bean counting, though. As a small startup, should you really spend like $15/user/month on a chat app that you get included with your office suite? Try to explain these expenses to your investors.
Google Workspace isn’t really popular here, most non-technical folks need office tools, and you’ll definitely need email, cloud storage, and communications, so yeah—I’m not quite sure how we would be able to do business without O365 or an equivalent platform.