You can already download alternative browsers, their engine isn't what is stopping them from running spam, it's the app review process. And in any case, I have

You can already download alternative browsers, their engine isn't what is stopping them from running spam, it's the app review process. And in any case, I have older relatives on both platforms and I don't see more problems with dogy apps on the pixel than on the iphone, both of them are full of spam notifications but otherwise totally functional. Most users won't change the defaults anyways, I think this fear is well overblown.