I have a Ruger 22/45 lite that I bought new in 2014. I shot steel challenge with it for several years. It is way out beyond 10,000 round count. I don't know how many rounds have been fired through it, but maybe as much as 25,000 rounds.
I still shoot steel plates, not in competition, with it along with several other .22 pistols I take to the range. I often have other people, sometimes new shooters, shoot with me and the 22/45 is generally the best liked of my .22's. It was highly modified for steel challenge shooting when new.
What might be of interest to others here is that this 22/45 is more dependable and enjoyable to shoot today then when new. If I remember right, the only parts I have ever replaced due to wear were one extractor and the recoil spring. I am not sure that you can wear out a Ruger .22, but I am trying!