Hasn't Remco won just one race this whole year outside of TT? Pijl or something unless Im remembering wrong? smashed in ardennes, smashed in Tour and thats enough to be considered making it a big '4' per these definitions?
Imo, the whole 4 or 6 now in 25 just feels like mental gymnastics based on flawed criteria to force a narrative.
Sorry but two guys are winning every big races for 24 months straight and even in a more dominating fashion, I think its fair to call it a big two currently.
If he is in good shape, I'm pretty sure he wins any important hilly classic (this year - LBL, GdL, WC) without Pogacar.
For me it's all about this:
Originally, we had a big 6 so we need to look if any of them can win easily specific races without all the other 5.
Roglic, without WVA, Pogi, Remco, MVP, Vingegaard, would win any GT he enters (without bad luck)? The answer is no IMO. So Roglic is out of the Big 6. Reduced to big 5.
WVA, without all other 5, can dominate cobbled classics? The answer is no right now. Reduced to big 4.
Remco, without all other 5, can dominate hilly classics (GdL, LBL and WC - when the route is for puncheurs/climbers). The answer is yes.
Pogacar - For sure.
MVP - For sure in cobbled classics and MSR + WC when the route is for puncheurs.
IMO, it's a big 4 but if we don't exclude "aliens", there is only a Big 2 but with Pogacar miles ahead of MVP.