You need this option:
It isn't very common anymore but I was told that if it isn't on the original system then it isn't 100% accurate. I was one of my first friends to use emulation when I was in junior high and everyone pointed out that the sound wasn't good or the colors were off and I was like 'oh well'. I think when the wii started using emulation for the virtual console it was suddenly ok to emulate.
EDIT: Also forgot this one:
I have a LOT of video games but live in a small space so they live with my parents. For me it is impossible to play them without emulation even if I wanted to. I fear the day my parents move or die because I'll have to sort out all my games and rent a space to put them or sell them. I've gotten rid of my entire child hood pretty much so I wouldn't have to deal with storage. Add up how much storage costs every year for 20 years and you'll do the same. My video games I just could not get rid of, it is like they are a part of me so they are in my parents basement living in 8 totes.
EDIT EDIT: I guess if my parents died my video game collection would be the least of my troubles, that sounded a little harsh.