We’re clearly thinking of or seeing different products. The older glass convection ovens I used to see were in the $300-$400 ballpark in the US back in the 90s and early 2000s, where as typical air fryers here are all sub $100 unless you are getting a “fancy” model that includes some sort of “grilling” or rotisserie functionality. As you are referring to prices in euros, I can only assume that we had very different marketed products.