In the days of VCRs, they sold tvs with those built in too! An obvious convenience until the VCR part broke, which anything with mechanical components will eventually.
They had TVs with built in DVD players too. But I don't recall those ever supplanting the separate devices. I can see why you might want to combined devices. You can reduce clutter and simplify cable management. TVs with built in digital TV receivers make sense. I like monitors with built in USB hubs so I can use different computers with the same monitor by just swapping the HDMI and USB cables.
But they saw the vertical integration possibilities and took advantage of it here. I'm not sure you are even getting a hardware discount to view those ads.
My mother bought a house in which the oven and the microwave were, for some inconceivable reason, one piece. We all hate and despise the microwave. But we can't get rid of it, because it's part of the oven.
I can't understand what anyone involved in the production of this monstrosity was thinking. It's a gigantic failure at the level of product design, product manufacturing, and house furnishing.
There is not even any "convenience" aspect to attaching your oven to a microwave.
