It seems like the software you mentioned does well because they are so small. I'm not sure a team similarly small could produce a modern OS that addresses the n

It seems like the software you mentioned does well because they are so small. I'm not sure a team similarly small could produce a modern OS that addresses the needs of generic phones (in the sense of they are truly incredibly complex oses, not in the sense of running on arbitrary phones). Notably, small teams can dictate priorities that don't scale at the level of tens of thousands of engineers.