Today I learned

There's new HTML tag, "details", that allows people to effectively code the LJ-style cut-tags.

Click the little triangle to see the code

<details><summary>[Summary text goes here]</summary>[Expanded detail text goes here]</details>

( Code for previous section )

Personally, I find it easier to edit the cut-tag rather than the details-tag, so I'm probably going to keep using the cut tag. Also I like the extra little bit of html anchoring that allows me to be easily link back to cut-tags in other entries. But the details-tag is a nice way to avoid spoilers in comments and stuff, which would've gotten more use if I was active in fandom anymore. Also, I guess it's a good way to maintain the spoiler tags if anyone gets linked to a single entry...so I guess the details tag has its other uses, too.