it's a bit broad to just say "antitrust regulations". You don't want to discourage success. You want to discourage gatekeeping. If consumers choose one company

it's a bit broad to just say "antitrust regulations". You don't want to discourage success. You want to discourage gatekeeping. If consumers choose one company overwhelmingly over another, leading to a "monopoly", it's not antitrust worthy enough to break up. If the company changes the landscape by making rules, protocols and standards with their products such that others cannot compete, then yes, antitrust would need to come in. Therefore, it's a judgement, rather than a set of rules. And it is in this judgement that one must foster.