[doomslice]

I can't downvote yet, but your comment doesn't add much to the discussion and is very hard to understand. And your edit is likely to attract even more downvotes since it just completely detracts from anything you were trying to get across.

[failwhaleshark]

Huh? Businesses need to expand by demographics or by categories. This is what Amazon did. They started with books and then continually inched their way into new categories, new businesses, and new demographics. Zero to 1, then 1 to N. That's how to grow a platform, or at least the holding company that comprises a collection of platforms. Keeping brands separate also reduce objections: Disney and (what was) Touchstone, Toyota and Lexus, Technics and Panasonic, Trader Joe's and Aldi.