Use whatever kit and setup that works for you. Believing that there is only one pure way of doing things for everyone, with one particular set of kit, is ridiculous. They are driving a different set of muscles and bones controlled by a different computer, why would what works for you automatically work for them? I have 4 harnesses that can be used for SRT, 2 caving ones, 1 rope access and 1 hybrid rope access/caving. All have slightly different setups and brands of kit, all work fine for me. I teach, work and cave with people that use a whole spectrum of caving equipment different to mine, and that doesn't bother me at all because it is what they find works best for them. Being exposed to the differences made me a better teacher, and means I can put my hands on almost anything available and use it, and more importantly, help people get better at using their equipment even if I don't use one on my kit. Stick to your preferred setup by all means, but belittling other people because of the gear or setup they use is arrogant in the extreme. I'll continue to use my 2019 Stop, Croll S, Freino, Handy, and "cord of shame" thank you very much.
As for the OPs reply - if you cleaned the Croll and sorted the issue, do you need to replace it? Caving kit gets jammed up and gunky from time to time, it's the nature of what we do. Any ascender is potentially going to experience the same issue if you're unlucky. The Turbochests are fine, I have one on a harness, but I didn't notice any improvement over the Petzl or CT chest ascenders personally.