I agree with jegermeister. Experience can be visualized in a logarithmic growth graph (opposite of exponential). In my opinion, if you have about 4,000 hours (civilian) with some TPIC the experience box is checked and you don't get a bigger (or smaller) check mark with more time.

If we're going to oversimplify this topic then the most common problem with some high time RJ guys is their attitude. Some believe that because they have 10k hours that a lower tier LCC should be lucky to be graced with their presence and should plea for an opportunity to hire them. This is usually picked up pretty quick by recruitment.

Most would also assume that 10-20 years of RJ Captain experience would translate to an 100% pass rate in initial training but no better example to prove that percentage wrong was seen throughout the industry after hiring Comair veterans. Don't get me wrong, this wasn't the majority and we have some great pilots from there but the failure/washout rate across the industry was surprisingly a lot more than a couple.