Also anecdotal but seen this confirmed by others:
Cutting out seed oils and eating more saturated fat (butter) lessens sugar/carb cravings by a lot and makes cutting out both of those toxins easier.
That's exactly what I do each autumn: Update to the macOS version from autumn last year.
So far I was fine with it though of course sometimes it's annoying to get the latest XCode (and iOS sdk) version for development, so I have to resort to a VM from time to time.