Database (urd) Design Strategy

[armsys]

Eventually I find the UR database question could be boiled down to one very practical question which matters you and me.

What's your actual user experience and feeling in using multiple urds concurrently?

Of course, our UR database can always be broken into multiple urds may it be personal, professional, legal, GTD, R&D, marketing & sales, technical issues tracking,...etc. So far so good as long as it's technically doable. How about:
1. Do you actually open multiple urds simultaneously and add/delete/edit/print/search Info Items across multiple urds on a daily basis?
2. Do you like constantly tracking the multiple urds, which to which, by pressing F6 or Alt+W?
3. Productivity can be improved by one mega urd or multiple urds, which one is predominantly advantageous?

I understand Kinook uses only one mega urd. There must be some motivating reason. Hope Kinook could offer us some insight.

I hope more experienced UR members could be kind enough to share their valuable UR experiences with us.

Armstrong