Linux

Microsoft isn't exactly doing anything new. It's the same strategy that's worked for them forever ago:

Get kids used to Microsoft products by vendor locking K-12 schools with cheap contracts.

Monetize those kids when they graduate (they never had privacy to begin with, so there is little pushback) and hope they don't switch to Apple's subsidized MacBooks in college.

When all else fails, lean heavily on corporate contracts, since corporations can't change their ecosystem set up 40 years ago.

Linux wins factor very little in the equation... and anyone switching to Linux is quickly replaced by the next kid who has had a Microsoft Windows keyboarding class every year since age 9.