There's no reason for Microsoft to do that. That will just alienate existing Windows users enough to try other OSes while providing no benefit whatsoever to the corporation. Even Apple, which is known for its love of walled gardens, allows executing unsigned code in MacOS. So I very much doubt we'll get a source.

I feel like it would get much better a mistake if they did... I use both windows and Linux now. I would rather use Linux full time but some software, specifically office and some (not most, but a few) don't play nice with Linux.

If I just lost a ton of programs that I would say are critical for windows, no doubt I switch full time unless my work prevents me.