Engine wear at warmup has little to do with oil flow and is mostly due to excessive fuel spray, moisture, and part clearances being way out of whack.Pour point is something that I still have difficulty with. I may have some sort of a mental block when it comes to pour point.
ccs, mrv and pumpability aside, I keep thinking if you can "pump" two oils per spec and both meet the cold temp (winter) spec but one pours, drips or flows easier and can go through tiny holes and get to the moving parts faster ... then it must be better for the engine.
How much better? idk, it could be insignificant but according to many including Castrol, "Most (%75?) of engine wear occurs during warm-up ..."
Basically two same W oils "meet the winter spec" and are "pumpable" but one flows or pours/drips faster ... so I want that one!
Having said that, I use a lot of 10W-30 since the 10 is still well within my winter temp range. So I'm not afraid otherwise I would use 5W or even 0W. But if it was very cold and no block heater, given the same W rating, I would prefer the oil with better pour point. Maybe it's just a "feel good or better" type of thing.