Right, but anyone could guess just the opposite and be equally as likely to be correct. The reason that I say this is because reliability is simply an unknown. Valid reasons why you might see fewer repairs on HST would include a fluid based system to buffer shock loads but it might also include the fact that the vast majority of HST machines are weekend warriors, many of them not much bigger than a lawn tractor, that get very few hours per year and those hours likely spent mowing. Virtually any machine that gets limited use will get limited wear and tear.
Also, up until recently, geared CUTS and Uts probably got heavier use and abuse than comparable sized HSTs. With the decline of geared machines, that's probably not as true now and a geared machine like mine probably gets no more use than the average BX estate tractor.
Valid reasons HST might have more repairs would include more complexity. The converse is true for geared.
But here is the thing. If my clutch goes out, I'll fix it myself and there are a fair number of people here at TBN who could do the same. I dare say there are few if any who are going to go tinkering around in the guts of an HST. Plus, I suspect my clutch will last longer than me. But, being a pessimist, and after going on and on about how great gear tractors are and about how I'm the Zen Clutch Master, karma is bound to step in and mine is bound to burn out next weekend and I'll be posting a step by step pictorial about how I replaced it myself.
But as has been mentioned, there are virtually millions of aged gear machines with thousands of hours running on the original clutch. No matter how you slice it, that's a proven track record.
We're all ears. I'm sure we think we've heard it all by now but a fresh perspective would be a joy to behold.
As for comments (from others) about the gear heads being elitist; well how does that work? We're the ones forced into buying primitive (and by all accounts useless and dangerous) tractors with few amenities because we don't have the money for a luxurious HST with heated cup holders and an iPod socket. How is it that we're the snobs?