We probably have a different perspective in Europe.
You’re forgetting an important factor : Sunday Bloody Sunday. Though it only had a minor release as a single, it got a very huge impact.
To me it’s the combination of NYD, SBS and Pride that put U2 on the map.
NYD was like « hey, nice ! ». SBS was like « whaaaat ?!? ». Pride was like « ok, right on ». And from that point on people were able to listen to the band’s back catalogue and get hooked.
From NYD towards Live Aid they were buzzing around enough in the public eye to get people to check out War or TUF.
Two Hearts, SBS, The Tube, UABRS, Pride, TUF (single), Band Aid, live shows.
I was aware of these as a 13-15 year old but not a fan.
Once people bought an album or went to a show, they were hooked as both were so strong.
By the end of TUF tour they had built up a big enough following to play MK, MSG, Croke Park & swarm Wembley Stadium