Unless (and I am certainly not in favour of this) the registrar started forcing all porn sites to switch to the .xxx domain then the well known sites will continue to get good traffic and newer ones under .xxx will simply not come into the mind of users which means the .xxx domains will not rise up the search engine rankings and will continue to grow slowly.

It would be useful to compare a couple of new sites, one under .com and one under .xxx and see which grew more and got more traffic, better search engine placement etc and then you’d have an idea of whether the domain idea is actually any good.

That said, .xxx came far too late, expanding beyond the basic 22 .com .org .net etc. and country specifics e.g. the “brand” gTLDs like .ford was long overdue – so you could have ford.com as a corporate site and say drive.ford for their consumer site. Coming up with gTLDs for different uses would have made more sense before the net was as popular as it is, now it’s just a mess as the roll out of .xxx has proved as it was too little too late.