I saw this argument over on Twitter earlier today too, and I’m not sure where’s its originating... frankly, does it matter? Buy the one that has the form factor you want and cooks the way you want to cook. When I see “counter-top convection ovens” they are large things that take up a ton of counter space, but have limited functionality and capacity. Meanwhile, the “air fryer” I bought is a lid on my Instant Pot, which means I’ve got 6 quarts of space to “fry” things they way I want. It’s been a fantastic addition for us to quickly whip out fish and chips without gallons of oil and mess.
Edit: Suppose I should mention I have an in-wall convection oven in my kitchen as well. It does “fine” but frankly sometimes I’m cooking for a large enough group that I need both the convection oven and the Instant Pot air fryer going at the same time. Plus, my convection oven takes forever to come up to full heat, so often the “Air fryer” is a better choice in terms of capacity and time.
I would say it matters insofar as anyone wants to apply understanding of the fundamentals of cooking to new tools.
Should I expect to use an 'air fryer' to do things I can already do with other tools—like toast bread or roast/bake something small, even though none of those is 'frying'? What are important considerations / differences relative to the small convection oven I already have?
If air frying is a fundamentally new cooking technique, then I may not be able to apply a wealth of cooking knowledge & intuition when using it, other than basic food chemistry. If it's a rebranded convection oven, then I can decide if a different form factor is worth it for things I already know how to do.
> “Air fryer” is a better choice in terms of capacity and time.
These are exactly the features that make it so effective for me. I love convection ovens but the air fryer is almost always more convenient with better results for the kinds of foods I'm cooking with it.
Edit: Suppose I should mention I have an in-wall convection oven in my kitchen as well. It does “fine” but frankly sometimes I’m cooking for a large enough group that I need both the convection oven and the Instant Pot air fryer going at the same time. Plus, my convection oven takes forever to come up to full heat, so often the “Air fryer” is a better choice in terms of capacity and time.