My point is that employers (esp Google/Facebook/Amazon) try to consolidate roles. The term "Full stack developer" encompasses a lot. That's a "10x"/rockstar dev

My point is that employers (esp Google/Facebook/Amazon) try to consolidate roles. The term "Full stack developer" encompasses a lot. That's a "10x"/rockstar dev. Carmack or Cerf probably would not make it through the levelling at Google. They are at a Distingushed engineer level.