Assuming, of course, that one's body _does_ naturally produce insulin. I'm glad it and other artificial sweeteners exist and are as prevalent as they are.
To add on to this, there's no standardized way of indicating what needs to be typed out and what needs to be replaced. `foo --bar <replace me>` might be a good example command in a README, but I had to help someone the other day when they ran `foo --bar <test.txt>`, not realizing they should have replaced the < and > as well as just the text.
I'm not an audio engineer or a musician but I got custom IEMs and they were a great decision for me. My ears don't work with the majority of in-ear style audio devices out there for some reason-- my left ear is fine but everything falls out of my right.
Back when I flew a lot, I could have my IEMs in but not listening to anything and I could barely hear the engines. There was a crying baby behind me and I didn't know until I took them out (while listening to music almost as quietly as my phone would go).
It goes without saying, but they're also incredibly comfortable too.