OK, I understand.

So, if a more granular export/import is indeed going to be implemented, I would suggest to do so as an extension of the Tools->Import and export... wizard. It should present an itemized list of check-boxes, a check-box for each category, with multiple boxes that can be individually checked or cleared. By default, all boxes should IMHO be checked. Also, "buttons" for "Clear all" and "Check all" should be there too.

I guess our dear Yutaka might suggest a list of check-boxes for us to comment (or vote?)

What do you say?