This is the most important thing to know for anyone trying to do SFP+ to 10GBASE-T. It's too bad it wasn't covered in the article.

The thermal performance of the new modules is so much better that they'll make you want to throw away all of your old modules as soon as you try one. The old ones consumed a lot of power and put out a lot of heat. You can find examples of people adding active cooling to blow on them because they're so bad.

The new ones are great. They get warm but it's completely manageable. And the power draw is also closer to what the SFP+ ports on your device were probably designed to handle, so compatibility is better too.