Originally Posted by EowynCarter
As to making development, it was made clear by quite a few people here that they don't want calibre to be improved...
Calibre is constantly being improved so that is a bit of a strange statement.
What IS true is that there is no interest from existing developers to change the internal file structure used by Calibre. There are plenty of good reasons why that is the case with one of them being the huge effort that it is thought would be involved. It is not that anyone thinks it would be a bad idea if it could be implemented - just that there are major practical obstacles to getting there.
Calibre is Open Source so there is nothing stopping someone who is interested in making their own fork and trying to change the built-in assumption about Calibre's internal file structure. I am sure that if it got far enough to look like it might succeed then there would be interest in merging changes back into the main branch.