> One thing that still sucks is package management / composer
What about Composer? Sure is in par with Slack when it comes to memory usage, bit it's functional and feature rich. v2 has partial offline support, faster downloads, etc. (https://php.watch/articles/composer-2).
Composer IMHO is one of the best dependency managers for any language out there.
Disclaimer: the link above is a for a site I maintain.