I’m not sure if it’s what you’re looking for, but Backup and Sync is a similar Drive sync utility made by google for personal accounts. The only feature that it doesn’t have is file-level sync settings (afaik B&S only has folder level sync options)
Backup and Sync lacks the coolest feature of File Stream. File Stream allows you to download files when you access them instead of keeping them all on your PC. For someone like me with lots of photos, a smallish SSD, and a fast internet connection it's very convenient.
Interesting, I use it at work and have nothing but problems with it. What sort of file count do you have on Drive? I suspect ours is beyond the testing scope of DriveFS and as such perfo nance is hideous and often freezes up computers for minutes at a time.