Re: Just to play devil's advocate here
"If you're doing the same job on the same product, new skills are of no use to you"
My mind simply cannot wrap around this statement. Learning new skills is essential whether or not you'll use them in you day job. It's not necessarily about the skills themselves, it's also about maintaining the ability to be a creative problem-solver. When you learn a new skill/language/technology, you are also learning things that make you better in employing the skills you already have.