Shame on Google and Apple, it was always clear this was the end goal and next up is also your PC.
Right after will come the removal off apps they don't like and there is nothing you can do about it.
Stallman was right
Even the language we are using to describe the situation is problematic. Why do we say "side-load an app"? It should be just "run a program"!
An OS that doesn't let you run programs of your choice is laughable.
More accurate would be "run a program not approved by Google"