You split developers in to two categories, but how do you know those are correct categories? What if there's another type of engineer that only knows about 200 and 400?
My approach is that conventional knowledge doesn't need to be documented in comments. Attempts at guessing how much conventional knowledge someone is lacking are futile. Those comments are similar to:
int a = 4 // set a equal to four
If someone doesn't know what 429 is, they should get confused, do their own research, and learn. Comments should not be turned into educational material about open standards, they should be about your business. There are much better places to learn about standards.
My approach is that conventional knowledge doesn't need to be documented in comments. Attempts at guessing how much conventional knowledge someone is lacking are futile. Those comments are similar to:
If someone doesn't know what 429 is, they should get confused, do their own research, and learn. Comments should not be turned into educational material about open standards, they should be about your business. There are much better places to learn about standards.