How many 4473's do you think have been filled out by lawful gun owners since 1968?
Anyone?
Trick question
There is no way of knowing because there is no number, no data base.
The forms are filled out and stay with the dealer at the licensed premisis, the ATF never sees them unless they physically go to that dealers place of business and asks to see them. They could ask for them to be mailed in I guess
Generally, when on an annual inspection, they ask to see the last 10 or the last years worth, check them over to see that they are filled out correctly and hand them back. Also ask to see my A&D book to see that SN's and descriptions match the 4473's. Other than secure storage, gun locks, etc. that's it.
When a dealer goes out of business, he is required to send them all in to the ATF, so there are those, in a box somewhere.
The ATF can request an FFL's 4473's at any time to aid a criminal investigation.
I go back to 1981 and am just small potatoes, imagine a LGS and how many they have. Multiply that by licensed FFL's
Not saying it can't or won't be done in the future but it would be a monumental task to enter each paper 4473 in a database.