Wikitext is amazing for page gimmicks, spicing up page design, achieving things you can´t with visual edits, and overall makes pages much better. I´ve noticed that some wikis are better at this than others, 2 major examples being https://vesteria.fandom.com/wiki/Vesteria_Wiki
https://rogue-lineage.fandom.com/wiki/Rogue_Lineage_Wiki
The majority of Vesteria Wiki edits are visual edits using templates. Some of the Rogue wiki is the same, but if you just look at how drippy their class page is (One of my guides got revamped and it´s also really nice looking now) you can tell that they´re making extremely good use out of CSS and wikitext. I´d say we´re between the two wikis right now, with @SkyCityXD3 doing a lot of creative shit with wikitext that forwards the wiki, and me to a lesser extent. I think if we were to write a guide on wikitext it would be more comprehensive than people having to look at the pages themselves, and would overall increase the quality of the wiki.
I´ll make it in a second, but first I´d like to link some well-formatted pages because our wiki struggles with CSS a bit.
https://rogue-lineage.fandom.com/wiki/Classes
https://rogue-lineage.fandom.com/wiki/PuppyBork%C2%B4s_Guide_to_Progressing
(Yes, I linked my own page but I only wrote the content, I didn´t format it, the combat section specifically is good)