Google will soon stop you sideloading unverified apps
unverified
ie, unsigned, so they are not
fighting tooth & nail to remove side loading too
Sideloading is still available: you can sign it yourself or bypass verification with adb as they documented.
Will Android Debug Bridge (ADB) install work without registration? As a developer, you are free to install apps without verification with ADB.
If I want to modify or hack some apk and install it on my own device, do I have to verify? Apps installed using ADB won't require verification.
So, cool misinformation.