He at least needs to win La Vuelta to complete the Grand Tour set but specialisation in the sport makes it so different to the 1970s and at least 10 times harder to win the variety of races that Merckx did.
It’s not as if he is fighting in a lean era of the sport. MVDP (classics), Remco (Hilly classics) and Jonas (Grand Tour GC and climbing) are all objectively contenders for top 3 all time in their respective specialties yet in the same season Pog has shown he can beat them all.
But without MSR and PR he cant be crowned "the best ever" or GOAT.
As i said earlier, it's understandable that he won't achieve the sheer number of wins. If he is able to be as dominant as he was in 2024 dor the next 2-3 seasons and wins what he is missing as big wins he should be considered GOAT or best ever (which is essentially the same regardless of how much fan boys around here try to claim otherwise).
Also, how do you know how easy or hard winning races is or has been so you say "10 times easie/harder"? One could say that with all the specific trainings and aero bikes, and nutrition specialists, and sports medicine, and much better roads winning races today is easier.
I mean, the whole tens of millions of dollars teams should make it rather easier to win if you have the necessary talents?