1st: The success of the R&R Express vs Midnight Express feud was so big Vince McMahon copied it when he created the British Bulldogs vs Hart Foundation feud.
2nd: The Rockers were a carbon copy in look, moves, even name, the AWA attempt to re create the phenomenal popularity of R&R.
3rd: R&R were excellent in ring performers, they were fast enough with enough high flying moves to compare to modern day cruiserweights but legitimately matched up well and were convincing going over much larger, more physical teams like The Russians & The Andersons
4th: Morton sold out arenas as a singles wrestler for his main event run vs Flair in 1986, fans clearly heavily invested in his character.
R&R was easily one of the Top 5 Teams of the 80s, alongside Road Warriors, Midnite Express, The Freebirds, and Hart Foundation. They were infinitely more successfull than their carbon copy rip off The Rockers, not even close. They were a perfect team for the decade and the promotional style in the industry, easily among the most popular acts in the industry in the decade as well.
R&R career highlights include...Hugely popular and long running feud vs Midnite Express, Brutal, bloody, violent matches vs The Russians, Feuded with 3 different combinations of Horsemen teams (brutal, physical matches vs Ole & Arn Anderson, excellent fast paced matches combining technical, high flying, and brawling vs Blanchard & Arn, plus Morton's singles matches vs Flair were as good as Flair's classics with Whyndam & Steamboat).
On a side note, the vignette where The Horsemen attacked R&R in the locker room, beating Morton so bad they broke his nose (rubbing his face in the concrete as Flair delivered multiple knee drops) is without a doubt one of the all time best bad guy beatdowns in wrestling history, easily among the most violent, and a huge reason for the credibility The H-men had as super heels.