From my personal observations most people are not 100% historical purist. Many people strive for a "style" that suits their personality, but add something modern or out of the "style" they try to emulate simply because the gear or tool works best for them.
For my I like sidelocks, but I knocked the rear sight out and inserted a more moedern peep sight into the dovetail because its easier for me to see and line the front sight up, but on the other hand, as soon as I can justify spenging the cash Crazy Crow's Trading post will start collecting said cash.