I have a feeling the group of people who side-load apps and the group of people who are willing to install a different OS are almost the same. 

My wife is a case of someone who uses whatever comes on her phone. If I didn't mention it, she would not be aware that you can get apps other than via the Play store. It doesn't even enter her imagination. 

So I'd say 99% of users won't even notice, because they weren't side loading in the first place.

Scoresby

I did already. But it still really sucks for everybody else. And who knows how they're going to attack GrapheneOS?

Is this really it, I'm not misreading anything? The average user basically won't be able to side load anything?

And let's be for real...needing to have GrapheneOS installed in order to side-load an app will exclude...99% of users.

Probably more like 99.99%, if I'm being honest.

devs

Direct install of apps going away on Android devices? Google approved apps only?

Signal312

I did already. But it still really sucks for everybody else. And who knows how they're going to attack GrapheneOS?

Is this really it, I'm not misreading anything? The average user basically won't be able to side load anything?

And let's be for real...needing to have GrapheneOS installed in order to side-load an app will exclude...99% of users. 

Probably more like 99.99%, if I'm being honest.