I applaud your decision to stick with what you like. There are too many photographer that go along like a herd of cattle, because "everyone else is" is doing it. You may have to turn down a few jobs, but if you stick with your principles, you will win out in the end - mediocrity is what awaits those who compromise."
For a short while it will work but not for the future, of course there will be always some retro fans like you and me, but I'm quit sure on the long run she will loose to much costumers!
Thats just a hard fact! If you like it or not!
Take care, Armin
The advice given is smart, I would stick with what you know and trade up to say an F5 or if your budget can swing it a F6. I admire you aim for perfection even though your clients would rather be content with digital files which sadly may not be accessable ten years from now. I have two friends who shoot weddings and both are about 90% digital in total output.
"Life moves pretty fast, if you don't stop and look around once and a while, you might just miss it."