What's the point of the 2TR in?

I use mine to connect an external CD/IPod player. I can play commercial CD’s via the same monitors and listening position I use for Cubase. It helps greatly when comparing commercial CD’s to my own mixes. Also, if I just want to listen to a CD/IPod without loading Cubase I can do that too. If I’m trying to learn a bass line I can play a CD, plug my bass into an input, put on head phones and practice. This would work for guitar or keyboard as well. It’s a very convenient feature.
Would it be cool to be able to record into your DAW via the 2TR…Yes! But…