I am known among my friends for the phrase, "Practice is cheating" for at least a couple of decades. I've been using my carry gun from concealment for USPSA and some local "carry gun" matches for years. For most of that time, the matches were my practice, so during warmer months, it could be 2-4 times per month and colder months, maybe 1-2 times at indoor matches. Earlier this year, I got tired of how my skills had eroded since 2010-2012 based on placings in IDPA and other matches matches in that time period and a wake-up call from how poorly I did at a recent Steel Challenge match. So since then, I've been actually practicing at least once per week at the range and still shooting as many matches as I can. I'm not sure how much it's helping, but at least I'm working on it now. I have not used a timer for a couple of months since I used it to observe some bench marks of my (then) current ability level on my draw/one shot and Bill Drills from AIWB with concealment on an 8-inch steel target at 10 yards. I do know that my confidence is returning and fumbles and other errors are diminishing in frequency.
I have not yet re-instituted a routine of dry practice. I am keenly aware of the benefits, but mustering the necessary discipline to actually do it currently eludes me. I've seen the results and dramatic improvements in a number of other people made possible by regular dry practice combined with some live fire practice. I anticipate that the necessary discipline will emerge soon, given that I've made big progress in that regard in other areas of my life in the last year and a half. Motivation is based on emotion, which eventually wanes and fails you. Real long term improvements arise from discipline, which is independent (at least for me) from emotion.