IMO, this is a topic that is definitely not black & white. There are a lot of grey areas.
Bottom line, the frequency of the feedings should be based on the snakes health. As long as the snake is maintaining a healthy weight, whatever feeding schedule it takes to keep it healthy, is what you should follow, IMHO.
I cringe when I hear "maintenance feeding" because while some use this term as meant to be that they feed less often than the "normal" but enough to keep the animal healthy. I know people who do this & have healthy animals that just grow slower. I think this is perfectly within reason. (More on this in a bit).
My problem with this term, is I have seen a number of people who use the term "maintenance diet", & have animals that are fed just enough to keep them alive, but they're not necessarily healthy. I have a problem with that. IMO, that is at the line of neglect.
At the other end of the spectrum, the term "power feeding" means something different to different people. Some people feel that the Munson Plan is power feeding. I do not think the Munson Plan is power feeding. (More on that in a bit too.) I use it as a starting point for my feeding "schedule". I do not feed on an exact schedule. I do feed them in groups (babies, juvies, adult females, adult males, etc). I feed failry close to the Munson Plan, but it is variable.
I have to say that (to a certain extent), slower feeding to keep the size small is not necessarily a bad thing. I use this with my Carpet Pythons. Namely, my Coastal female. While she is just a baby, & is on the baby "schedule" & gets fed once a week along with the other Carpet babies, once she is bigger, I will be feeding her at a slower rate (or smaller prey). My intent is that she not grow to a huge snake. I do not want any of my Carpets to be huge, so in a sense, they will be maintenance fed. I want them lean, but not thin, when they're full grown.
I do have one IJ Jag baby, that is too thin on the weekly feeding of the Carpet babies, so I began feeding her on the 5 day Corn baby feeding schedule. She has a higher metabolism, & needs more food than the others.
There are times when the "7 dayers" get fed at 10 days, & sometimes due to shed cycles, can go 2 weeks before the next meal, but it's variable, so it doesn't hurt them.
I think it's very important for each person to really know their snakes, & know when they're too thin, or too heavy, & adjust their feeding accordingly. Don't get caught up on a specific "feeding schedule".