Support from ALPN (Application-Layer Protocol Negotiation)
Application-Layer Protocol Negotiation (ALPN) Support where good.
To ensure the best possible compatibility of support would be very good here.
Of course, this is not a priority but would be good.
So could the future https, http, be http / 2 Easy granted.
I think they will do it in next Plesk Release like Plesk 17. Unfortably this is with actuall os systems which plesk 12 uses, not possible.
AmaZili Communication commented
Http/2 in nginx is already done. ALPN is definitly the next step.