I've been reading various Mac/Apple sites for nearly twenty years and I haven't encountered another Apple-specific site that has as much forum discussion as MacRumors.
That doesn't make MacRumors a better discussion site, it just means there are more comments to read -- some of which are nonsensical blathering or utter falsehoods.
There are several sites that I only read (I don't comment) because the overall quality of the technical discussion is pretty high. Naturally there are some sites where the signal-to-noise ratio is extremely low.
Let's say I do that antiquated behavior of using an Internet search engine to find answers to a technical question and I get a bunch of results: Stack Exchange, Reddit, Quora, Macworld, Yahoo Answers, HowToGeek, and others. I'd be inclined to look at 2-3 of these sites before perusing the others based on historical track records of technical wisdom.
One thing I avoid is doing technical research at YouTube. A carefully written and edited article with numerous screenshots and well-formatted step-by-step instructions is likely to be more accurate than some vlogger spouting off randomly about his/her "theory" in a 3-minute screamfest.
If that written article happens to include a complementary video, that's fine.
If I want a wide variety of opinions - MacRumors. I have come to recognize who knows what is what when I have an issue with a Mac. Also if there is a problem with recent updates you will hear about it fast on Macrumors. Lots more beta users and people who update quickly means more info!
Mac-forums - when I have a serious issue I post there for fast and helpful information that is most likely going to be right. Mac-Forums recently update their forum software - very nice. They tend to be a smaller group with very active and knowledgeable admins and moderators that will jump in and offer help quickly.