It’s fundamentally unenforceable, even if they tried to do what they’ve done to phones and not allow other OS’s to be installed, you could still get development boxes, embedded boxes, etc that by nature of being what they are could not have locked boot loaders.
Yup I can’t verify at all sometimes now.
I understand the purpose of it, but if you are using your phone in a smart manner (you shouldn’t use a cell phone for genuinely urgently serious things just for bare minimum) then it’s not a huge deal. The biggest thing it will help with is things in the realm of Pegasus spyware that will use memory corruption bugs that gain arbitrary system access. If you do not use the phone for things you should already (even with GOS) NOT be using a cell phone for, you will be fine.
Tor is a military project so it’s like saying water is wet. There are lots of other options.
It’s very easy, a lot of these huge platforms are just corporate adware and military/intelligence propaganda machines, creating something real with real people will blow it out of the water.