Matthias takes you on a trip explaning the principles of package design, which is to a degree still uncharted territory in PHP land. The talk is quit abstract, which is reflected in the artwork used - I could not always infer the meaning of an image just by looking at it, although I feel it was designed to be clear. Also, being a practical guy, I could do with just a few more examples with existing packages...
But putting aside those minor points of improvement, the material that Matthias brings is (as always) food for thought with huge implications. I'm very glad I finally got to see this talk :-)
Learned alot about determing whether a package is stable enough to depend on and what and what not to put into the package itself.
Very interesting talk and i hope to meet you again in future meetups.