My training philosophy is "limiter driven improvement." I constantly seek out my current climbing limiters and design drills and progressions to improve them. The easiest way to find a limiter is ask, "Why did I fall?" I ask that question not just when I fall off a limit-level climb. If I fall off a warm-up, that is an equally valid data point. Maybe I'm rushing my warm-up and that lack of "being in the moment" is limiting my climbing. This fundamental deposition towards limiter driven improvement makes climbing intrinsically motivating. My primary focus is increasing climbing competence, sending more and harder climbs is a welcomed by-product.
I collect personal climbing limiters and design my next training session or cycle around improving them. Currently, one of my biggest limiters is not pushing enough with my feet when I'm pumped. I don't automatically jump to "I need to be stronger" to improve this limiter. Limiters could be technical, mental, or psychical. I approach this limiter from technical and mental perspectives. I have a deposition towards over-powering moves at my limits. I need to readjust this strategy towards finding technical solutions. Mentally, I like being in control. When I'm pumped I'm start to lose control. I try to regain control through my strength. I'm working on being okay with losing control.
By using this method, my climbing is still improving. My gains are not in leaps and bounds but a little each time I climb. That improvement keeps me engaged with climbing even after 10+ consistent years.