I believe Anova's owners (Electrolux) already make full-sized combi-steam ovens. Miele is one of the biggest competitors & already makes a bunch. A few notes on full-sized ones:
1. They are in-wall (APO is free-standing)
2. They are plumbed (APO has a removable tank that also has an easy-refill lid on top)
3. They are expensive (starting price is typically $4,000 & can easily reach more than double that)
4. Most do not have as many features as the APO has (wi-fi, app, probe, low-temp mode for proofing & yogurt-making, etc.)
I consider the APO to be third-wave cooking or "the oven of the future". Wrote a short post on it here:
Basically, it:
1. Stupid-proofs cooking. Repeatable results across a wide variety of functionalities (air-frying, dehydrating, sous-vide cooking, etc.)
2. Makes cooking easy & gives you effortless restaurant-style results. Want sous-vide burgers? Shape & place on tray, cook for an hour or two, sear! Melts in your mouth & can be made ahead of time!
3. Allows you to be as creative as you want in the kitchen. Want to proof dough & then steam-bake it like a commercial kitchen? Or sous-vide up some sliced steak & then dehydrate it into soft jerky that doesn't pull your teeth out? Or use the dehydrator function to turn those old grapes into raisins? Or air-fry some chicken wings? (fresh or frozen!) There's steam-injected baking, there's sous-viding without a bag & without a bath, there's conventional baking, there's convection baking, you name it! It's the ultimate powerhouse for people who want to experiment with different techniques & make really awesome food in their home kitchen!
The newer in-wall combi ovens are catchup up to Anova's technology. Personally, I plan on having 4 Anove ovens total in the future, with an overhead outside-ventilation system. I'll have saved up for my second unit by this Christmas, so then I can run dual cooks (ex. one overnight cook & one cook for dinner), or use them both as warming drawers during the holidays, etc.
If you're cooking exclusively at home using a regular eating schedule, that's 3 meals a day, 7 days a week, 21 meals a week, 80+ meals a month, 1,000+ meals a year. Plus however many servings are required to feed your family. The average family of 4 spends about $7,000 a year on food, with $3,000 of that being fast food, and $1,500 going to waste. So for me, this lets me cook better, cook easier, save money, eat healthier, etc. Between this & the Instant Pot, I have it made in the kitchen haha!