What are the cons of moving to HTTP/2?

Question

Nginx

Hello!
I began to consider the issues of switching to HTTP / 2 and from the pluses multiplexing of requests and security over https are clear.
But the obligatory nature of https raises doubts whether this will entail any disadvantages for the website (I will immediately make a reservation that the certificate is decent, not self-signed)? There is a suspicion that the ubiquitous https may be bad for SEO, but I'm not sure.
Maybe someone else thought about this issue or has already switched to HTTP / 2? It would be interesting to hear thoughts and feedback.

Answer 1

HTTPS has a positive effect on SEO. Google prefers sites with https.

Answer 2

When you enable https on the site, Yandex for some reason thinks that the site http and https are mirrors. In general, you will need to do a 301 redirect. I don't know how much this affects SEO. There seems to be no other disadvantages of https in terms of seo.

Answer 3

The load on the server will increase due to encryption-decryption.