Why use SPB Mobile shell with custom roms out?

[quickstang]

Here is what my screen looks like....


I as well have this question of...Why upgrade the ROM when Mobile shell is installed?

I think that custom ROMS may also give you updates of WM as well.

If there is a better reason to upgrade, it would be nice to know.

If the phone works better, programs are updated, etc etc...OK But if its just upgraded Manila then why bother?