[AlphaCerium]

Side loading on android is laughably easy, probably easier than installing a program on a Windows device. If we can consider the installers that Windows users need to use to get something as simple as Chrome installed easy to use, downloading an .apk file and opening it and pressing install should seem trivial by comparison.

[realusername]

Even Fortnite gave up on the standalone install, we don't need to speculate, we know this method doesn't scale from past experience.

The only apps I know which are exclusively distributed this way are stuff banned from the store or developer tools.

[FirmwareBurner]

F-Droid and all the apps there.