At what level should that commanding share be? Microsoft wasn’t found guilty of anti-competitive behavior because Windows was on 98% of PCs sold, it was because

At what level should that commanding share be? Microsoft wasn’t found guilty of anti-competitive behavior because Windows was on 98% of PCs sold, it was because they used that position to ensure that no other businesses could compete. A company owning their product end to end isn’t an issue. It’s using that position to manipulate pricing in a market (the definition of anti-competitive behavior).