I find myself repeatedly referring to the Sage Advice Compendium (SAC) entry that defines what counts as magical; however, there is no way (that I know of) to directly point at that entry, the best I could find is pointing at the page in the SAC. Or I have been pointing at other questions that ask if something is magical, and have a decent answer discussing the SAC entry that I can refer to.
I've been thinking about posting a self-answer question that asks, "When is something magical in 5e", and essentially answers by explaining what the core rules say (little), and briefly what the SAC is, and finally reproducing that SAC entry, maybe with some added commentary.
As I had some negative reactions in the past with asking questions that I think would be useful to have in answering questions, I thought I check in here first to see what the community thinks about adding the question. If the answer is no, that should not be done, I also would be grateful if someone has a better way to refer to that specific entry.