Never installed KM 5020i but brand new Brother originals don't ask for Time zone for sure, time is set via Initial Setup. Should Factory reset don't...
I think nothing dramatic in short term. After fiasco with toner shortage/outage KM is shaken and forced to release a "new" 1i models. The future will...
I can't tell you which models, but once they go into an error code the Settings Menu may become inaccessible. And if you replace the printhead while...