At Google, no one wants to work on existing things. You must create new product/feature to get promoted. Then you move on and thing gets shutdown. This is direct consequences of their internal incentive structure.
I don't see Google running a service at a loss for half a decade.
All gadgets that are internet connected will stop working sooner or later, I guess with Google it is sooner.
This and privacy concerns is the reason I'm abiding anything IoT. Why should I purchase something that I can't own.
PowerShell still relies on conhost.
Do you mean PowerShell ISE instead of plain PowerShell or do you mean cmd.exe instead of conhost?
The risk of breaking something for someone is just too high.
This is also why Wine struggles from version / config to version / config. They cant account for every edge case the way Microsoft does / has. Microsoft by comparison has unlimited resources while Wine is just volunteers who can only test so much software.
https://www.youtube.com/watch?v=8gw0rXPMMPE
Granted, conhost will stay for compatibility reasons and this is a new thing.
But it's open source: https://github.com/Microsoft/Terminal . And according to the readme contains the source for conhost.exe too.