Breaking D2 language/spec changes with D1 being discontinued in a month

[bearophile]

SiegeLord:

> I think that unless people responsible for these things get 
> their act together and stabilize D2 against these issues, D1 
> support should be extended until that happens.

It will take some more years to see D2 "stabilized" like that. 
The decision to discontinue D1 has some disadvantages, but 
keeping D1 updated uses some work time that could be (better) 
spent improving D2.

Bye,
bearophile