I guess that tall people could build bigger ovens for themselves. Also oven usually has some extra space inside, so it's not as tight as it looks. But yeah, of course it's not something one would do other than of necessity.
These things are extremely easy to reconfigure, and no cabinetry is not very expensive. Even utilising just standard residential ovens, they come in 600, 750, and 900 widths, and a variety of heights. There are plenty of commercial electric ovens available, I assure you.
But those are standardized too, and definitely not something a builder would demand you buy.
Usually you buy a house/apartment here, and then you buy a kitchen separately, and they ask you if you want a standard oven or a built-in one, and they leave a hole for either... I guess you can buy an oven with them too, and they install it, but you can definitely buy any standard sized one, and just screw it in, eg:
Main problem with ovens is really that the "typical" size is just bad. I never used full size of it, I don't think I even used half the size of it, and it just makes it heat slower.
Double ovens are a thing but you rarely see apartments outfitted with those and if you already have an oven, air-fryer makes more sense than replacing single oven with double oven.
I have a small house/kitchen. I got rid of the entire oven. Replaced it with a two burner counter top and an instant pot that does 7 things (including air fryer). Certainly it limits cooking a bit and requires some creativity, but at the end of the day, couldn't be happier with all the extra space.
Yes, but that doesn't mean they'll actually fit in a standard residential kitchen space.
In the US, kitchens normally have a very standardized space for the stove/oven. It's a particular width (I don't know it offhand), and if it's outfitted for electric, it has a standardized 240V outlet. You can't just put anything there: it has to be the correct width and height, and have the correct power cord. There are fancier kitchens with separate ovens and ranges, but you can't just put those units into an existing kitchen; you'd have to redo all the cabinetry, which is very expensive.
Also, commercial kitchens generally use gas ovens/ranges. Not all residences have this available, in fact many just don't. If your area doesn't have natgas, then you have to have propane installed, and that's expensive to do, and may not be allowed where you live.
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