My thoughts...
You can buy P+D rolls from the mint intact without Ws in them if you wanted to set some aside. OBW rolls in general are a gimmick in my opinion, I'd rather go through 40 rolls and put together a tube of the best examples to set aside rather than sit on a roll of unknowns, that said though people make money off of it on the bay, selling OBW rolls and people buy them.
As OBW 2019 rolls get scarce in the future due to the Ws, I can see the price rising on them, but, I can also see a scam side of it where they were searched and will just be solid Ps or Ds and no Ws, and of course the seller will say "ohhhh, bad luck!"
I mean at the beginning I bought 10 rolls from a webite seller that claimed "guaranteed unsearched". That seller now sells the Ws by themselves. Needless to say all 10 rolls didn't have a single W in them and I am certain they searched them to take out the Ws to sell.
I don't really know, market dynamics, supply and demand, what it's worth vs. What someone is willing to pay, where it ends I don't know.
In the end people buy OBW with the hopes of pulling out a great example from it years later, like a time capsule. If people strike out that demand is gonna dry up quick and people will just buy the graded W they want and skip the gimmick.
In the end its about the coins, not the rolls. I could see 50 years from now the roll hunters beating up all the Ps and Ds 2019s looking for the Ws and finding a high graded examples P or D being the harder coin to find than the Ws.