Yes, propietary devices are very secure. Very easy to lock myself out permanently. Yesterday I tried to help someone to login to Samsung Android tablet. There

Yes, propietary devices are very secure. Very easy to lock myself out permanently. Yesterday I tried to help someone to login to Samsung Android tablet. There is Android Q feature that requires previous Gmail account and password, even after factory reset. Tried 3 gmail accounts of tablet owner. Login works on laptop, but not on tablet. Reply from Samsung was, there are no workarounds. So it's not possible to login to tablet, and not possible to install any alternative operating system. So that tablet is expensive paperweight.