Some people don't like using it. The other problem is it creates issues if a decision is made to perform a transfer/trade on the spot.
I'll give you a fun example- I went to a gun shop to do a transfer before and they told me they couldn't do it because the owner wasn't there. I still wanted to sell the guy the gun, so I just burned up a personal FA-10 on the spot to do it, and one of the staffers printed out one of the PDF ones, we filled it out, signed it, photocopied it, and mailed it in. There is no way in hell we could have used E-FA-10 to do that transfer on the spot like that unless one of us had a smartphone and was really savvy with the thing. It's probably doable, but tedious.
There's also the problem where some people meet up to do horse trading at the range and what is going in what direction is not decided until the meet
occurs- so have fun filling out an E-FA-10 on the range in the middle of tinbuck 3 with no cell reception.
Not having paper FA-10s available is bad for a variety of reasons. Even if you -like- using E-FA-10, there are occasions where having the paper form is
way more useful/viable.
-Mike