> iOS also doesn't allow the browser to be updated after the hardware has reached end-of-support.

Just simply not true. Plenty of browsers are still updated for iOS12 and 8-year old hardware like the 2013 iPad Air (which I still use every day)

Edit: getting downvoted - while writing this post on iCab Mobile browser which was updated less than a month ago...

Follow-up: Well I tested the language ‘feature’ in this browser - and though it didn’t crash, it didn’t run the function either. I’d forgotten what a sh*tshow of crappy and unnecessary garbage modern front end JavaScript development was.