Yet again this is a cooking related thingy
Air fryers - don't believe the hype - these things can cook chips reasonably well by modern standards, but a fryer with beef dripping produces much, much, better chips, but they are good enough. You can cook some types of sausages in them at the same time and the fat out of the sausages will help make the chips a bit crispier. Fresh sausages tend to leak more sugar, sugar makes everything stick, so frozen sausages are better in an air fryer.
For a low effort, safe, fairly high calorie meal that's an alternative to justeat on those days you can't manage anything else, they do a reasonable job, bung the stuff in, turn on, go lie down, 30ish minutes later a loud beep, passable junk food.
They can also cook roast potatoes and yorkshire puds, again don't believe the hype, they can't cook fish, prawns, stir frys etc, not well enough so you'd want to eat them anyway.
Second up is halogen ovens, for some things a halogen oven is easier and produces a better result than a conventional oven. I found it particularly good for macaroni cheese.
In fact that was all I ever ended up cooking in it so it's currently back in it's box in the loft. It didn't really meet my needs, and the main bowl is glass, and it's heavy, and difficult to balance for cleaning unless you have more strength in your hands than I have.
I can see the market, I can see that for some people they would be good, again one of the main features is they turn off automatically so safer than a conventional oven, but unless that is really important to you, and you love macaroni cheese........they can cook fish, potatoes, lots of stuff, most stuff you would cook in an oven, if it'll fit in, it'll cook it - but it is more of a grill than an oven.
oh...and the glass bowl, it gets hot, really quite hot, not surprising but worth noting. Bad things may occur if you forget this.