My buddy Mark used to toss out soggy leftover fries and pizza every week. Ever since his wife got that little oven with a fan, he's roasting chickpeas and wilting spinach that would have gone bad. The thing heats up so fast he doesn't avoid cooking a single portion like he used to. He told me his trash bag is mostly empty now, and his power bill dipped a bit. It just makes using up those last bits in the fridge feel easy, not like a chore.
I read a piece about how these small ovens cut down on food waste big time. It talked about turning stale bread into croutons in minutes, or roasting random veggies before they go bad. The writer said it changed their whole kitchen vibe because nothing feels like a lost cause anymore. That totally lines up with what you're saying about making it sustainable.