I had 2 cats growing up and both died from urinary tract issues and/or kidney problems...they were on all dry food (purina cat chow).
When I got my cats, I wanted to feed high quality, but was still a dry food believer (better for their teeth, etc.). I eventually moved to feeding EVO dry (no grains, high fat/ protein). I liked that I had to feed less, I liked that there was less poo to clean, I liked that I didn't have to buy food as often. The price, although higher than regular dry, I think ended up equaling out due to the fact that I fed less.
All that said...
1. It did make some of my cats gassy at times
2. Their poo did smell more than it did when I fed regular dry
3. One of my cats developed a couple of UTIs, partially due, I think, to the high levels of minearls and magnesium, ash, etc. in the high protein dry.
With that in mind, I'm now feeding about 50/50 wet and dry and am trying to feed mostly non-grain wet food and a dry food that is good, but has good levels for UTI health.
I think all wet would be ideal, but I can't afford it right now and, unfortunately, the cats seem to prefer the dry food.