Seconding Kurt_415's question, your statement that _importing_ drivers into WSUS will no longer work is concerning.
Because absolutely, I don't think a great number or orgs sync the entirety of the driver category. That basically guarantees that WSUS will implode under the weight of its own tech debt. However, it's important that people be able to use that mechanism for driver deployment where necessary.
That said, I question the validity of whatever survey you did. I'm a MVP, part of the CCP program, and spent most of my career working with MS update technology, and this is the first I'm hearing about such a survey. WSUS is used by countless small orgs that form a long-tail of orgs run by single person IT departments that don't have time to participate in any kind of social media. So unless you did some unprecedented push to reach out to 10s or 100s of thousands of orgs that you hither-to-fore have not communicated with then your survey is not representative of the actual user base.