As a long term user of Mathematica I cannot fail to notice that Wolfram Research seems to have changed their release policy considerably:
For the most part of Mathematica's history you had one release every other year (on average). I liked that because it guaranteed stability, compatibility and well tested functions which worked together well.
Now you have several releases per year, each time with hundreds of new functions (and many bugs as a side effect).
Does anybody know the rationale behind this move? I don't want speculative but qualified answers from people with some background knowledge. Thank you.