Let us craft from Retainer Inventory

[Velev]

Use this "inconvenience" to train your memory. You'll see you'll remember all what you have, how much units, and where, pretty quickly.

While i would agree with you of course, considering one of my retainers is full and the other one is close to being full, that makes a total of about
5x5= 25 items per page
7x25 = 175 items per retainer
175 x 2=.... see where this is going?

If we were talking about 100 items then yeah, no problem remembering but there are more than 300 items.

Sure i can recall plenty but why should i if a simple system can be put in place.