I'm talking about way more than just CPUs... And for your question, we'd pretty much miss out on modern-like mobile phones entirely. 90nm -> 18A/1.8nm is a LO

I'm talking about way more than just CPUs... And for your question, we'd pretty much miss out on modern-like mobile phones entirely. 90nm -> 18A/1.8nm is a LOT of reduction in size and energy... not to count the evolution in battery and display technology over the same period. Now apply that to weapons systems in conflict against an enemy that DOES have modern production that you (no longer) have... it's a recipe for disaster/enslavement/death. China, though largely hamstrung, is already well ahead of your hypothetical 2005 tech breakpoint. Beyond all this, it's not even a matter of just slower, it's a matter of even practical... You couldn't viably create a lot of websites that actually exist on 2005 era technology. The performance memory overhead just weren't there yet. Not that a lot of things weren't possible... I remember Windows 2000 pretty fondly, and you could do a LOT if you had 4-8x what most people were buying in RAM.