Buying a 650b wheelset when it's being phased out

[weaponsgrade]

I've been kicking around the idea of a getting a 650b wheelset for my Open Wide to see how it rides with fat tires, i.e., 2.0s or above. But I've been noticing rim brands, like Reserve, have dropped 650b wheelsets from their lineup. It's also slim pickings for tires, my bigger concern, as compared to 700. I don't want RH to be my only option. Escape Collective hosted Vroomen on a recent podcast where he said tire makers are dropping the size especially for their higher end lines. I think I'm going to regret getting a 650b wheelset when two years from now I can't find any performance-oriented tires. What does the hive-mind think?