Size and easy to clean (and waterproof) is one, I have a ChefSteps Joule which is app control only, but it is much easier to clean, and much smaller than my old Anova (fits in a drawer with other crap)
Granted it is more annoying to use the app than the controls, but the trade off for us was worth it, if not for everyone.
I think in terms of actually doing stuff AMD is close in terms of power draw (W/performance) but it’s the little things like going to sleep and while completely idle that the entire MacBook draws so little power that needs to catch up – and that’s not entirely on the processor.