... I?ve got 3 wild cut outs from feral bees. Never treat them barely inspect them and these hives have been with me for 4 years now. Varroa count is low hive beetles are so so wax moths non existent. ....
This matches my observations. These [types of] bees, once they reach an incredibly "packed" status, seem to be able to deal with all manner of pests in a "sustainable" way - for years on end.
My friend adds a supper (and harvests one) in May. (That's pretty much the end of the 'main' flow here.) Last year I told him to check that (new) supper in mid June. He did - it was drawn and full - he hadn't believed me till he saw it with his own eyes. Pointedly - he argued with me, before doing it, because he didn't "think so" and didn't want to enter the hive. (It was a guess on my part).
I think he could harvest 3 or more suppers off of each of those hives, if it were timed right.
Beekeeping, hobbyist and commercial, needs a "cure-all". ... Maybe, just maybe, if we took Feral Bees, allowed them to "pack up the hive" for a year or two, the formula might emerge where disease/pest resistance and honey production were joined together.
... from Michael Bush, I learned one over-riding lesson [paraphrased], "the bees know what to do, and what's best - let them do it" (hopefully I understood his points correctly)