At the end of the day Gates wanted to sell products for money, straight up cash transaction, take it or leave it. Google et al are sly and underhanded, you don’t know the price upfront, they try to turn you into the product...
So, you are basically trying to say that proprietary is better because we don't know what the open source version costs? Well, you have the source code... so I guess you may not be willing to look inside, but the other one you don't have the option to even look.
It is not free, unless you think Google is made of unpaid volunteers and all its shareholders are charities?
You are Gates’ customer, but you are Google’s inventory
Or here:
https://chromium.googlesource.com/chromium/src/
Compile it and run it, you are inventory of Google for compiling free source code that you can modify however you want? Where do you get the source code like that to compile for Windows?
2) you have no assurance that that’s what running on the handset nor what’s in the firmware or the driver binary blobs
Here is the license for Android:
https://source.android.com/setup/licenses
Where is the license for Winblows?