I say it's up to the owner, of course. I might cringe, but I can't call it "wrong."

I don't respect period correctness or original equipment most of the time. I started caring about it recently, and I worry that I'm becoming a curmudgeon. I am going to keep an English 3-speed original by not upgrading the twist-shift with a trigger shift. I also plan to sell this bike.

I'm also fixing up an old English 3-speed for someone, and I agreed to give her two quotes: one for functional parts and one for period-correct parts. She'll decide once I give her the options.