Whichever contributes the most to anti-competitive corporate culture. Most problems at the end-user level can be solved by having sufficient competition (and some labor problems, too).

Unfortunately, there are plenty to choose from.

There's Microsoft's "embrace, extend, and extinguish" strategy. Comcast's creation of artificial legal barriers to competition by lobbying state and local lawmakers. And then there's Amazon doing it by sheer hard power to put competitors under (plus all their anti-union crap).