Whole thing is well worth a read, but just from the title alone I was ready to write a long rant about the term ‘sideloading’. Gladly that’s covered on the text too:

It bears reminding that “sideload” is a made-up term. Putting software on your computer is simply called “installing”, regardless of whether that computer is in your pocket or on your desk.

I’m not sure why Google just doesn’t track who opts out of Play Store protections to side load and then refuse to support anything further. Power users will be happy, they’re power users. Grannies have been warned. Where’s the problem?

Block by default, opt out of blocking explicitly. Give users that choice. If I want to riddle my phone with viruses and bitcoin miners that’s my problem.