The annoying thing is that, if they change the key_share extension to another number (and mark the current one as "reserved"), they'll have to run the TLS 1.3 e

The annoying thing is that, if they change the key_share extension to another number (and mark the current one as "reserved"), they'll have to run the TLS 1.3 experiments all over again (to see if there's anything on the new number), delaying TLS 1.3 even more.