Unless you're a GS athlete, why bother with the 2 x 48 kg power snatch at all if you're already power snatching 90 kg on a barbell?
Flipping it around: unless you are a weightlifter, why bother with the barbell power snatch at all when you already can hardstyle snatch two kettlebells? Why bother with barbells at all if you already have the kettlebells?
KBs are capital inefficient for scaling vs a plate loaded barbell + plates. Buying 6 kg in change plates to go from 90 kg to 96 kg costs a lot less than 2 x 48 KBs.
That's a fair point. However, if you already are invested in kettlebells, it's considerably less (you may already own at least one 48 kg for presses, for example); even less if not nil if you accept a slight discrepancy between bells (for example, 48 kg+44 kg).
Another thing to consider is that the purchase price is not the only cost associated with either implement. Even if I threw away all my kettlebells it wouldn't be easy to even store a barbell and plates in my apartment, not to mention train with it safely and without the neighbors calling the police. Sure, I could solve all these issues somehow - but the (continuing!) effort wouldn't be justified by the savings.
I think the disagreement lies primarily in a perspective, and specifically, what we view as a starting point. For you, a weightlifter, access to barbells and the ability to perform the Olympic lifts and their variations is a given, while heavy kettlebell ballistics are an addition to be scrutinized. My perspective is the opposite: I see kettlebells as given, while barbells and Olympic lifts as an addition that would need to justify investing time and resources - and fails to do so. I also think that for most people the latter reasoning should be applied.
Also, I thought we were discussing KB swings not KB snatches.
You replied to my post suggesting low rep, high power training with KB cleans, snatches and jerks, saying that you don't understand why anyone would use kettlebells like that and asserting that the barbell is the right tool for this job. My response was about challenging this argument, I haven't mentioned swings at all.
A minor correction: I've noticed that at some point I've switched my example from cleans to snatches, but it doesn't really impact my argument.