New XC MTB Wheelset & Tire Strategy

I will likely do that. Good points all around.

I still need an extra wheelset and am looking for recommendations on the best enduro or trail wheels or recommendations on where I could find reliable info on what makes good enduro wheels and what factors I should be considering in my purchase. (see OP for more info as to why 3rd wheelset)

Same request for info re: gravel tires on XC MTB wheels stands too! Don’t even know what’s possible here. Just slap any gravel tire I want on 29er wheels? Wider is better? 45mm enough? Or should I look for ≥50mm?