its the difference between hard sci-fi/strict rule fantasy and 'science fantasy'

Magic can have strict rules, or it can be hand wavy. And sci-fi can use the exact same logic of "oh, theres a highly advanced tech that lets us overcome quantum physics limitations you know of"

I can’t see the content (except for a thumbnail).

I think the real difference is that fantasy (and science fantasy) has parallel sets of rules (natural vs supernatural), neither of which reduces to the other. It’s the irreducibility that’s critical, whether or not the rules are strictly spelled out.

Me neither and I dont see a thumbnail either, just the title of the post and nothing else

Yes?

Yup, its a thing. The practice itself has generated large followings recently which can lead to various opportunities. People love their escapism. Seems to be a “we” thing rather than being one creative’s work.

But there's nothing stopping you from creating a believable rule set for your magic system. There's a reason why Fullmetal Alchemist is so good.

Like others, I can't actually see anything but the title.

So I'll just soapbox a moment and say that I think some circles get way over-invested in trying to super-hard delineate between one and the other. It doesn't reduce the value of a label if it has varying flavors within it; if anything, it's good to have some variety within a label.