> At this point it's worth recalling the Law of the Internet: blame attaches to the last thing that changed.
> There's a lesson in all this: have one joint and keep it well oiled.
> When we try to add a fourth (TLS 1.3) in the next year, we'll have to add back the workaround, no doubt. In summary, this extensibility mechanism hasn't worked well because it's rarely used and that lets bugs thrive.