Quota enforcement was a blocker for official Drive linux support because it would have made the abuse issues even worse. (Not saying its going to happen now, but one blocker has been cleared)
If you want a mature, maintained Drive integration on Linux you can have it right now with ChromeOS.
https://source.chromium.org/chromium/chromium/src/+/main:chr...
Google barely squeaked by with $76 billion in revenue last year. It only has 156,500 employees.
You can't possibly expect something like that from a company this resource-constrained.
Per https://abc.xyz/investor/, Alphabet made $75 billion in Revenue in Q4. They made $76 billion in net income for all of 2021.
And that's why we now have N open source third party syncthing interfaces and no clone of the GDrive client.
* Google doesn't see enough gain in supporting a Drive client for Linux
* Linux users don't see gain in feeding the beast
... so nobody dedicating their finite lives to solving this problem is win-win.