How does one acquire source for deprecated Windows products?

Question

Microsoft seems to go out of their way to disable support for devices that were a fair investment for their users.

Kinect - which had a lot of promise for a variety of assistance-enabling tech, gone by the wayside. Trying to download the SDK is a cumbersome ordeal. Support in 11 is borderline impossible.

Windows Mixed Reality - If you're not going to maintain the codebase, open source it, please. You're making thousands of headsets into e-waste. Give the code to the fans. We'll make it work.

Skype - bought it, ruined it, discarded it like an old newspaper. It was the most popular and functional VOIP program in the world... until months after MS acquired it and ruined it.

ALL of the 3D viewer/modeler features in 10 - gone with the latest update to Win11.

Strategic Commander - I had this working all the way into Windows 7. There's nothing special about it. It's basically a keyboard with some limited motion sensing. I had to fight to get it to work in 7. Win 8 utterly destroyed any chance of it working. It was useful and I loved it. Dead.

Sidewinder anything - yeah, some of them used the now-extinct game port. Many of them didn't. MS peripherals? Excellent hardware that still holds up. If only I could use it.

Zune - cough

I could go on for hours with features and devices that MS just dropped for no reason*, but the point is this: If you want people to adopt and use features of your platform, they have to trust that those features will continue to exist.

I no longer have any faith that this is the case. Every time I buy in, and start to explore something cool that Microsoft made, it gets deprecated, and not just abandoned - it gets forcibly removed and locked away from me and every other enthusiast that was having fun with it.

If you don't think it's worth your time, Microsoft, if there's really no money to be had in it... give us the repository!

*obviously there was a reason - MS is publicly traded, and the feature/device wasn't making the stockholders fistfuls of cash...