I put an 11-36T cassette on a few different wheel-sets, because the 11-34T was insufficiently low when paired with a 46/30 T crankset.
The latest example was with a 2X GRX derailleur for my wife. It was clear that there would be plenty of room to go lower, perhaps to 40 or 42T.
It is good to have options, especially around steep (> 20%) grades, and as age takes its toll.