Come back when they have done this for 24000 third-party packages.
I don't see the connection. I didn't say that they have more packages, just that they have very good packaging tooling that makes it simple to make consistent packages.
When you package 24000 things, you find significant diversity in build systems, languages, source code, testing etc. It isn't easy to package all of that in simple ways.
I don't know exactly to what the 24000 number refers to. Solus Project does already have 5000 packages in the repos. I think that is quite an accomplishment for a pretty small team of 3-4 people with some help from the community.
I think the Solus guys would have a word with you. Even with no packaging experience it is pretty simple to create a package for Solus Project.
Here a short intro:
https://wiki.solus-project.com/Packaging