[alluro2]

Do you mean because the previous "flagship killer" company now needed a "flagship killer" sub-brand, since they could no longer be categorised as such?

[Raed667]

Exactly, why did they end up in a situation where they are making killers of their "main" phones ?

[zozbot234]

Because all midrange phones are "flagship killers" on a features basis now, flagships are just about the exclusivity. The market has adapted and the term no longer makes much sense. OnePlus still leads on custom ROM support though, e.g. no special codes or waiting times needed for unlocking the bootloader, it all works out of the box with standard commands.