I thought I was the only one. This is a 10wt and a 5 wt with single foot guide hook keepers to match guides. I keep a bag of SF guides (mostly the smallest size, some bigger for rods that might see some big 2/0 flies).
The only problem I see is when using a heavy shooting head line the running line can come over the rod and wrap around the HK while the line is shooting out. Happens a couple times a day when casting all day. Minor details, never had a problem on a trout rod.