Well, I'm pretty sold on sous vide. Mostly because of what long low cooking does to meats. Less so for fish. And, importantly, sous vide is excellent when entertaining: there's no last minute pressure to get things right and one can hang out with the guests.
On the other hand, I ogle air fryers, deep fryers, er–not @Margaret Pilgrim's but @Smithy's new instant pot, CSO, etc. etc.
Editing second to identify the correct enabler 
Edited first: to add that for easy cleanup I have a cleaning lady
