10 networks that...
You dont get the point, do you? stop rambling about DALnet, focus on the idea of all networks larger then yours claiming more space in the list... and after that the smaller networks; that simply will not fit.

chances are you never check if a network is still alive...
Wrong, I have scripts doing that job for me. But, as with DALnet, a network not responding for a few days, or even weeks, doesn't mean their entry is skipped from the list immediately. So the (bi?)monthly update always has some broken entries. (Note however that the list included in a mIRC release is always smaller and only holds better established and stable networks.)