Right but what I'm trying to say is that the core architecture hasn't really changed since the 90s. All the improvements you mentioned are non-applicable to my statements. One user account per app is just a hacky way to use unixes timesharing origins for increased security, VMs and containers slap a bandaid on the problems, and permission systems like android and iOS have are just a hack that works nicely since they use sandboxed software. Plus, these are all security based, which while the topic of the discussion overall, wasn't what I meant when it came to OS innovation in general (an important part, though)