Ever since discovering a use for APPLY for the first time approximately 2 years ago, I've found I use it almost everywhere these days.
To the extent where I start looking for candidates for re-writing using APPLY! --> thankfully I'm about to move onto pastures new so the 7 years worth of stored procedures and queries I have here will no longer be candidates for such an exercise!
APPLY truly is a remarkable technique and this article adds another strong argument to the reasons why you should have this in your arsenal - if you don't yet feel confident working with APPLY work through the examples here and you'll see how powerful it is.
thanks for another great article and keep up the good work