Originally Posted by
CyclingMTB
they all told me that sealed cartridge bearings are the most efficient and durable ones, although 1 or 2 guys told me that cup and cone hubs work fine.
Both of those points can be true at the same time.
Clearly cup-and-cone "work fine" as we've been using them for eons. That doesn't necessarily mean that some cartridges are not an upgrade over that design.