As very lightweight shells have come available, I find I'm using my old windshirt for local walks and dayhikes a lot still, but not taking it on backpacking trips.

My OR Helium II rain shell at 6.5 oz in size large doubles just fine as a windshirt. My older (2008 or so) Golite Wisp windshirt weights 2.7 oz. Don't see the reason to bring both.

What I love the hoodless Golite windshirt for is that on just a long local walk I can wad it up and literally stuff it in my pants pocket when I warm up --- no need for a small backpack or even fanny pack.