You don't need blink for that though. The current WebKit based chrome syncs just fine.

Sure, you don’t. But Google might say “real Chrome is at the Google Play Store for iOS, the one in Apple’s store is outdated and we’ll kill it off in a few months, because that’s what Google does”.

And that amounts to 5-10%?

That's several million people.

Fortnite has that, it wasn't enough to threaten Google monopoly on Android.

That's just one app, there's going to be thousands of apps available to install once installing your own apps is an option.

Chrome is also one app, what's your point though? That Google will come up with more favorable app store on iOS? Hardly unlikely, given how much inertia people have.

I don't know if it's likely but there are a lot of big brands that can't get their apps on the Apple store for whatever reason, just like Fortnite and Chrome. With enough of them, alternative app stores will take off.

I think the biggest category is alternative stores.

Like NVIDIA Geforce Now or Steam.