Just because something is possible doesnt mean its a good idea Abigail-II. Yes Perls OO is flexible. Yes its a good thing that can do Java style OO, but I don't particularly thinks its the best use of the flexibility perl provides. Theres a zillion other perlish OO variants that are more interesting, and actually solve real problems, not just a peevish dislike of using hash key/values or array slots, or glob slots or... as your object base.

Frankly for me you are conflating two issues here. One is perls OO, the other is whether its a good idea to use dialects of Perl as provided by techniques like the one here, or source filters or the like. Generally I consider such dialects to be a bad idea. They make your code less maintainable, its not sufficient to have a good understanding of Perl, instead you need to have additional skills to work on the code base.