Vintage porn buyers have a limited "shelf-life" they wont be around to buy in 10 or 20 years
There will always be a market for high technical quality but I think realism will be more exciting. If you want proof of this: people fap to the crap quality on tubes all day long
Also, see the above -- vintage porn is not today's of technical quality but it is still popular -- why? Is it the hairy pussies or the seedy reality?