> The original iPhone did not permit installing an alternate browser.
It didn't permit installing anything at all.
And even when it did allow app installs, I get why they wouldn't want people installing browsers: it's a great opportunity for third parties to absolutely wreck the device UX with garbage third party software. Banishing Flash from the platform was a genius move, because bad flash apps absolutely dragged the web to a crawl in the early/mid 2000s. Banning the worst offenders from the platform gave them a huge leg up in performance.
The thing with the iPhone is that a subset of boffins really want it to be a Mac or a Windows computer, when from day 1 it was always a Nintendo Switch. Consumers voted with their wallets and it won in a landslide. Now it's become so advanced that people confuse it with a general purpose computer, but that was never the deal, never the business model. Europe is basically trying to take Apple's platform and force them to give it to third parties gratis. They're mad because Apple is complying with the letter of the law, but not the spirit of the law which is for Apple to depart the EU market entirely.