cool list, but the method doesn't actually show introduction, but rather when the first submission to the format was, which can be misleading.

lgpt was not introduced with the lpgt major - it was introduced at a later spring tracks. the lgpt major was remix format and only later changed to lgpt.

I'm also pretty sure that even tho dd1 seems to be the first battle to have 0cc and bb1k, they were actually introduced in spring tracks and later added to dd1.

mod4k was definitely added for s3xmodits gauntlet , but then was immediately hosted as an ohb so the first submissions were there - I'm pretty sure this applies to some other formats as well.

this list shld see some revisions, if we actually want it to show the formats based on their introduction date instead of first submission date