I think it's just a matter of opinion. I've used both O365 and GSuite extensively at different jobs, and after the initial switch, they are not too different, each has their annoyances, but I don't see a major change in productivity or quality of output between the two.

In my business I like the option of sharing a .docx or .pptx and not having to ask a client to use google docs to view stuff. But when I had google docs, I made it work. I agree with the root comment that MS is much more business oriented though. At the end of the day, Google's "products" are still just a ruse to sell ads, so they don't have the institutional focus on solving business problems that MS has (not that MS is in any way perfect)

Spot on. GSuite is a temporary thing, a fad. Microsoft 365 will be around long after we are all dead.

Lots of horrible-to-use software is extremely successful commercially. This usually happens when users of the software are not the ones making purchase decisions (SAP) or if there are strong network effects (Windows).

I think the comment was about enterprise/business support, not features.

Some businesses arguably care about their employees.