How are you locked out of business by not using Google? Enough companies run solely on Microsoft products without any issues. Others use separate providers for Email and conferencing (e.g. Zoom). I don't see how not using Google is a problem when dealing with other companies.
Quite the opposite, it's still much harder to not use Excel if you exchange data with a lot of business partners.
"but you can use separate services for video conferencing, calendars, emails, look at all these other organizations that are less convenient and doing it just fine"
yeah I'm aware. if you have a choice on a new organization, low budget but still able to access good, fast and cheap, use Gsuite.
Quite the opposite, it's still much harder to not use Excel if you exchange data with a lot of business partners.