The point is that, to me, this question of backward compatibility is not 
theoritical. I do have a big amount of code and objects that I will just 
have to reimplement if backward compatibility is broken. I mean months 
of work, just to keep in sync with this kind of development. And if I 
have to do that for each release, well then it would be much easier for 
me to stay in 3.8 and maintain my own fork.


Stef