What to use: IPv4 or IPv6?

Question

Computer networks

Actually, the question is in the subject.
What is the best IP to use for websites and why?
Is it true that IPv6 is better for mail?

Answer 1

90% of Internet users and 99% of Runet do not have access to IPv6 (not Teredo). It is possible to make servers without an IPv4 address only out of a desire to popularize IPv6 or for personal use. But on the other hand, there are no special problems in setting up both protocols, if there is nothing to do, you can add it. Google, Facebook, Yandex, Vkontakte have already added what makes you worse?

Answer 2

It is better to use IPv4 for sites, since not all providers can access IPv6.
However!
If you are going to organize something "for petty pranks", then of course IPv6 is better