why the need to have all this partitions? limiting everything... wouldn't be wiser to just have 2 partitions? one for rootfs and other for all other storage?

I just think that linux screwed this up. I have 4 email accounts on my n900, i'm being carefull to delete everything thats completly unecessary.. when I shouldn't be concerned of the space.

is there any way to resize these partitions? or even join them? (which in my opinion is the best way..)