What statistics source are you using to determine the 'largest framework' here?
Even if we go back to the 2021 Jetbrains developer survey (https://www.jetbrains.com/lp/devecosystem-2021/php/) out of the 11 named frameworks/platforms people are using all but 2 of them use PSR and composer.
You keep making these assertations which frankly are coming across as absolute bollocks from someone who's stuck in the early 2000s.
Even if we go back to the 2021 Jetbrains developer survey (https://www.jetbrains.com/lp/devecosystem-2021/php/) out of the 11 named frameworks/platforms people are using all but 2 of them use PSR and composer.
You keep making these assertations which frankly are coming across as absolute bollocks from someone who's stuck in the early 2000s.