A lot of them are planning on going to Pathfinder 2e, , I can understand that. If nothing else, the ORC (Open RPG Creative) License has been a smart maneuver and made Pathfinder look pretty appealing.
But I think jumping from one crunchy fantasy TTRPG to another is a missed opportunity.
And, no... I am not about to tell you to try OSR games. (Though they are awesome...)
I'm going to tell you that you don't need to buy a new system. There is an even cooler option: make one that is tailored to your game world.