I still think he is clearly the strongest in the peloton (even against Roglic) man to man (in W/kg). The only thing that was against him was his team strenght. This year they showed it's still a problem, but with his plus 5 min lead and being that better than others it's not visable as much. But with their rumoured new signings (Soler, Almeida...) and big budget, in the coming years they could match Ineos and Jumbo-Visma.
Without any misfortune in the coming years I can't see anyone beating him. When you try to find his weak points, you are in trouble. Only one I can think of is extreme heat and that is still unknown really.
So for next years TDF, competitors better hope for extreme heat for all 3 weeks, with no rainy and cold days, combined with Pogi losing some time in echalons. And then others maybe have some chance.