Yes, and not to burst anyone's bubble, but I don't see a significant change in the irons as we move through cycles. Then again, I've hit the ball the same for 30 years, through countless sets of Titleist/miz blades. In all honesty, you're not going to wear these irons out unless you're hitting sand covered balls at the range. I get most of my change in the shaft, looking at trajectory/ball combination mostly. Good Luck. Great clubs!

If you have money to blow, go for it. Or better yet I can take that money off your hands to pay my bills.
If your iron grooves are worn out, go for it.
If you want more forgiving, higher launching, more distance from a T200 and up, go for it.

If it's none of those cases, you don't need new irons.