LOTs of misinformation here!! I'll try to answer "some" of it.
NO one states what tiller?? NO, they are NOT all created the same! Most of the tiller misinformation is because the posters own, use or have only seen light duty tillers, and they have no idea how to set up and run a tiller properly!
They DO make big tillers, over 15' wide in some cases. IF you are breaking your tiller on stones, then it's a light duty tiller! If you are grinding up your soil, you just don't know how to properly use a tiller! The only tillers that ruin the soil structure, are the ones owned by folks that don't know what they are doing! IF you think tillers are too slow, you have the wrong tiller or on too small of a tractor. Tillers do not cause more compaction than a plow.
I could go on and on... Sad part is people keep repeating this crapola over and over! lol
BTW, when plowing, you are NOT supposed to "turn the soil over", you are supposed to stand it up on edge!
I've been doing custom tilling for more than 40 years; I've learned a thing or two about it...
SR