If you were to launch a new mail server right now, many networks would simply refuse to speak to you. The problem: reputation.
Email today is dominated by a handful of major services. […] It’s become increasingly unusual for individuals or businesses to host their own mail, to the point that new servers are viewed with suspicion.
And so it goes for most technology discussions: decision-making power ends up concentrated in the hands of a small handful of organisations, often to a point where those who would like to broaden their horizons are unable to.
The experience with email merely demonstrates that it’s not just an issue of standards compliance.