I had an Instant Pot for several years, and now have a Ninja Foodi for about a year. Each have a niche to fill, but neither is great at everything. I'd see people online trying to cook literally everything in their Instant Pots...hamburger patties wrapped in aluminum foil and pressure cooked? Blegh. Seemed like it's a device that works well for people that don't or didn't ever do much cooking and got popular because they felt it enabled them to make food they consistently liked. I like both device's pressure cooker feature for certain things, particularly those that traditionally worked well in Crock Pot style cooking. Green chile pork is still a regular dish in our house. But for me it's not a hammer in search of everything that might be a nail.
Nor is the air fryer feature on the Foodi, but I do like it a lot in certain scenarios. It reheats fried chicken and skin on chicken great, and quickly. Pretty much as good as when it came out of the fryer or the grill. I'll buy bags of cooked chicken wings from Costco or whatever and use that to cook them quickly and I like the results. I once tried pressure cooking a whole chicken and then using the air fryer function and it worked alright, but I didn't love it. Because I have the space I keep them around, and I do like using them for certain things in certain situations, but I could live without both and just use the stove or oven if I lacked the space and didn't mind the time for traditional cooking methods. The air fryer definitely does not replace a deep fryer, but it's good for quick lunches without a mess.