I've actually moved away from an open bridge (mostly anyway). I've always had an open bridge with my chin almost on the cue, but a couple of years ago I apparently developed a herniated disc (C6) that flared up after a few consecutive extended pool sessions (8+ hours). Didn't know the cause at the time. I did this 3 more times before finally realizing it was the pool causing it. Each time the pain lasted and excruciating 1-2 months.
Anyway, once we (me and my physiotherapist) finally clued in to what was causing it, I changed the way I shoot. I'm now more upright. And for some reason was having a really hard time adjusting until I went to a closed bridge for the first time ever.
I still use an open bridge for thin cut shots, and end up getting down lower than I really should, but anything fairly straight , I'm using a closed bridge with pretty good success.