Re: Windows 10 can't save the PC market
Windows 10 is an OS designed to make Microsoft more money. It is not - and never has been designed "for the users". And MS's method of improving profit is to massively reduce the cost of developing and maintaining Windows - primarily by replacing paid testers with users, and making it much cheaper to develop Windows as well.
1) By moving to "Windows-as-a-service", MS eventually only needs to support one codebase (albeit with a few different versions of that codebase out in the wild). Far cheaper than supporting 3-4 different editions of Windows at once (ie, supporting Vista, 7, 8 and 10 as they were doing when 10 first came out).
2) By binning most of their QA department, they save a fortune on testing staff. Why pay people when you can use "insiders" to do it for you?
3) Also, by forcing businesses to use Semi-Annual Channel (by crippling LTSC by blocking Office 365 for example), you help ensure lots of businesses also take part in Insider testing.
4) By forcing updates and telemetry, they ensure that home users become the final round of testers. It had nothing to do with improving security and everything to do with MS forcing the updates onto home user's PCs, then using telemetry to spot trends with app/system crashes and other such issues they'd missed during the Insider testing. This allows them to fix these before the update reaches business users (where the real money is).
5) By also forcing driver updates, if a bug is found in a driver you can get the manufacturer to fix the driver, force it to user's PCs so you can quickly resume the forced updating and testing process.
6) To ensure you have a sufficient pool of "home testers", you roll out a "free upgrade" program which aggressively pushes home users onto Windows 10. This maximises your testing pool and ensures your telemetry is providing useful data from a large sample.
7) Finally, by going down the "Windows-as-a-service" approach, you can get away with minor tweaks, rather than having to ship an entirely overhauled OS every 3 years. Look how much Windows 10 has changed in 4 years - only a few minor tweaks here and there. Then compare that with the difference between XP, Vista, 7, 8 etc. In short, it allows MS to put far less effort into developing Windows whilst still making it look like they're doing something at least to keep the cash rolling in.
In short, re-releasing Windows 7 isn't going to happen as it'd cost MS money, and their whole current approach is cheaper development.