I have mastered air friers too in the last 10 years... even more used than the microwave for me. And since I have this ninja one that does 260 C, man, it's impeccable for almost any sort of experiments.
I wish there would be a version with smaller fan sizes and more zones, because that makes the cooking more even, but I can't complain with this already amazing feature.
Also, another invention I would love one day would be inside home air fryers with a smoking feature. If I find one, I will buy it... tried multiple times to sort of hack one apparel I custom made, to try it, but there is too much convection air flowing, and all attempts resulted in either too much smoke, or completely (aka too fast) destroyed wood chip material. Also, some sort of chaminé would be nice to conduct the smoke into an exhaust.