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As I said, this brand is a total dead end for any serious cyclist, unless you coincidentally happen to fit their default setup.
Not "any". I know a ton of "serious" cyclists that have not had a bike fit, including myself. Personally, I'm not real sensitive to differences between bikes- within reason of course, and after a few min of riding a different bike - I'm "used" to it. Just like how I'm not really sensitive to small differences in stiffness, compliance and all the other jargon.
Being unable to replace parts is a different story. Bars don't last forever, seat posts can break/get corroded, proprietary clamps/fittings can break, easily in some cases... I'm hard on my equipment and ride bikes till the wheels fall off - for that reason, bikes with proprietary parts - I'm out.