Found this completely unhinged article linking Sayonara Jackpot to every song Iyowa had written up to that point...

https://jyunreaistdoudoudou.hatenablog.com/entry/ar1950704

【自意識過剰】さよならジャックポットを考察する【こじつけ】 - 堂々堂～純セメスのブロマガ→はてブ～堂々堂～純セメスのブロマガ→はてブ～

Apparently Iyowa was thinking about quitting when making that song... I hope he's enjoying it now