Yeah, I guess if you have a very specific problem that you need help with, it's better to ask about it on Discord. But for the general questions that many noobs are likely to face that the blog post mentions ("How do you make for loop in reverse?" or "What allocator to use in WASM?"), I still think SO would be the better platform, if only to avoid trying the patience of the helpful people on Discord too much...
And even for specific questions like the one he mentions after that you really want to have them somewhere in public, because someone will eventually run into a similar problem