These accounts are quite interesting (@cyclinggraphs and @naichaca who provides him the data an collects it in the web Vamhunters) and not, if his meassures are accurates the trendlines of all elite climbers are not quite the same, taking the best perfomances of the gc riders, it´s clear that peak Rogla and peak Pogi are clearly better and more consistent in putting high numbers than their current rivals (including Bernal) and very simillars to peak Froome and Contador (excluding 2009 version) but even a bit better in all kind of efforts specially Primoz despite Pogacar having more status as a climber nowadays.
So yes, the general level in climbings has raised in last years but not that freakingly much like everybody says and not in all kind of climbs compared to previous era, and of course are still far of w/kg of the 90s and early 2000s obviously for clinics reason, excepts maybe in puntual shorts efforts. By the way, Horner "in another era" has slovenians numbers in some USA and spanish perfomamces of his career, maybe even a bit better in certain climbs
In the other hand Nairo is maybe the better climber fs his generation and the current generation in pure w/kg capacity, but can not produce his higher crazy numbers with the regularity of the slovenians or his generationals rivals Froome or Contador, specially in grand tours.
So yeah, Primoz is clearly underrated as a climber, maybe for his unorthodox style.