Gundark
Explorer
In the mid term, Paizo will do well, regardless of what happens with 5E. Their bread and butter is subscriptions, and people who are committed enough to subscribe to a product line aren't very quick to jump ship. Paizo has earned a lot of loyalty.
If D&D 5E can provide modules that satisfy those who want a more complex game with more character options, then the Pathfinder rules system is probably in trouble, long-term. But, assuming the 3.5 to 5E conversion documents work well for Pathfinder as well, I suspect that the Pathfinder Adventure Paths and Campaign Setting will be rather popular across both games. Regardless of what happens, that's a valuable IP.
Yeah in some ways Paizo's APs are kind of "system neutral"