Moshe means that it’s not a standard feature and a little work may be required to get the desired functionality.
Of course, Magento is not a be-all end-all solution, it just tries to cover the most popular/useful features that appeal to a wide audience. Anything more would be considered bloat, imho. Now, one thing I do like about modularity is how mootools setup their download, whereas you select only the modules/functionality you need, but it’d be difficult to do that with a large ecom app like this.
As an aside, I’ve created some confusing quotes based on Moshe’s with hopes that they will entertain a chuckle out of you. :D
“You cannot achieve the impossible if you only focus on what’s possible and ignore what’s not improbably impossible.”
“If you customize not, you will not have customized, but if you have not customized not, you will have not not customized.”
“Nothing is not impossible without customization, but nothing is impossible without not not customizing, so don’t not customize!”