Nah a whole bunch of jurisdictions made it so that with appropriate firewalls and other features there need be zero egress aside from the singular entrance/exit door.

Windows can be unopenable etc.,

It's literally because of hi rises and the issues with it being pointless to jump from 10+ stories (you'll also suffer less, as the smoke will make you pass out long before you're actually being burned).

Yes, both rules vary by jurisdiction. I was just saying many places have both.