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If you tell 2 beginners to build something with PHP/jQuery/JS, and send one person to W3Schools and the other to PHP.net/jquery.org/MDN, I have no doubt that the W3schools person will get something done in workable state faster.
That's not the point though, I'm not going to say different strokes for different folks.
Instead I'd say, if that beginner uses the 'slower' path instead, that will pay dividends in time -- they are better of learning to use the docs than getting paid peanuts for delivering that project which depends on the juniors faster.
So a beginner should use w3schools while they see fit, and then move on to MDN, etc. when they find it to be unsuitable for their purposes.
A beginner on the other hand would have their SO questions locked/closed within minutes because it would likely break any one of the thousand little rules SO has (to reduce duplicates) that are unknown to beginners.
Horses for courses; I read the official MDN and PHP docs now, but I didn't when I began because those sites assume an enormous amount of prior knowledge about programming.
In any case, "W3" is just another representation of 'www', which the W3C doesn't have any kind of claim over.
OpenAI isn't open. W3Schools is unaffiliated with the W3C. The world keeps spinning.
That's optimistic, optimistically. It's a group of ivory tower academics with no stake in any browser implementation acting like they have any right to tell actual browser implementors how to behave.
Well, I totally prefer that, than letting Google decide by themselves
And besides, what makes you think Google listens to them?
The name is so confusing that if you search for "w3c" on DuckDuckGo, the first result is W3Schools, and then the official W3C website.
Some programming languages ship a good tutorial as part of their documentation (e.g. Python), but not all.
From the looks of it, it seems like blocking w3schools is quite popular among Kagi users [1].
I have a feeling I know your answer - as a financial professional I initially used Investopedia in a pinch but over the years realized their accuracy has an inverse relation with the specificity of the topic. After seeing incorrect formulas and descriptions a handful of times, I eventually stopped using it completely.