A Wargaming employee has recently said this in WoT RU Forums:
Translation:
I have good news: we changed something in the pipelines of preparing micro-patches, and now (I hope) we will start new folders less often, because micro-patches as a whole affect mods less. From time to time, we still have to do this, but at least not as often as it was in 9.20.1.
Tell us what you think about this in the comments below.