I feel like all that will create is "partnership contracts" where a large company will be split into the "ideal" size tax-wise while still being run by an "advisory board". Compensation gets interesting at that point though, so many its an interesting idea.

a constellation of partnerships happening through more tangible corporate boundaries sounds much better. right now it seems to happen in unclear ways, and I assume is much less observable from outside forces (e.g. Sidewalk Labs & Google & Intersection, etc.)

What you propose break economies of scale which are often needed to do something cheaply.