True. Its not a singular thing though - they also get their recruitment and surrounding infrastructure correct. The playing style, training methods etc stay fairly consistent. You'd never see them signing a Fellaini or a Lukaku.
There's no reason why Solskjaer can't be successful in the long term, but the bigger thing for us to nail is ensuring that our playing and footballing philosophy is absolutely nailed down, permanently. If we're going to use the likes of Pep as an example of younger, newer coaches being successful then they need to be armed with a plethora of technically gifted and tactically adept footballers. We need more Martials, Rashfords etc, and fewer Lukaku's and Joneses. We need to take recruitment seriously and ONLY sign players who fit the right template for how we want to play.