Or how many years(!!!) it took for smartphones to gain even the most basic copy-paste functionality, for example.
It's really very obvious that you're supposed to just consume media with smartphones and not ask too many questions or be able to do too much with it
And I'm not talking about "user-friendliness" (most appliances really are not remotely user-friendly either) but about leaving out any kind of functionality that might allow someone to repair, customize, maintain, or otherwise tinker with their system, including basic functionality like "run a filesystem integrity check/repair on a microSD card"