I don't know many series that were based on actual light novels and not a web novels.
Some series i know are
Slayers
Tokyo Ravens
Durarara
Beautiful Bones Sakurako's investigation
Rascal Does Not Dream and Pet Girl of Sakurasou are both light novel first, same author too. Slayers is the funny one on your list though, it ran in a magazine and got collected into volumes after, which is the web novel pipeline with no web.
Slayers being older than posting chapters online broke something in me 💀
6Magazine serialisation was the web novel of its day. Waiting on the next issue instead of refreshing a page.
4Every pipeline is the same pipeline:
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Genuinely did not know that about Slayers
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Lodoss War started as write ups of someone's tabletop campaign in a magazine. Best origin story going.
There are hundreds of these, people only clock the isekai ones. Think of the web novel as the rough draft and the light novel as the version someone actually edited.
Rough draft is doing a lot of work there. Plenty of web novels get chopped to bits on the way to print and the people who read them first never let it go.
10Fair. I meant it's the version studios option, not the better read.
14Which is kind of the whole answer. Studios buy whats already sold.
2Oregairu, Oreimo, Tomozaki. Bakemonogatari too unless im wrong about that one?
Danmachi and Classroom of the Elite too. Bakemonogatari never touched a website.
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