According to https://www.datanyze.com/market-share/office-suites--370 Google holds more marketshare with G Suite with 59.91%, compared to Microsoft Office 365 with 39.96%

Yeah you’re talking Office 365. Let’s bundle in all the companies using on premise Office (2012, 2016, 2019, etc) and I bet the numbers are flipped drastically.

Office 365 is a subscription service for both on-prem and cloud. It would be pointless to include the old Office seats since the conversation is about bundling Teams with Office, and that is only done with the Office 365 offering.