Re: What's Google afraid of?
So, you should ask Dell, HP, Lenovo, etc. or yourself if you custom-build your system for patches for Windows?
I think you'll find the EULA on a PC is with Microsoft and not with Dell, HP, Lenovo, etc. This makes Microsoft contractually obliged to maintain the software.
With phones the software contract is with the manufacturer and not with Google. Unfortunately, we haven't had enough court cases to improve the distribution of security updates by those manufacturers.