Yes - you do concede the point that Synta Tech equipment doesn't last
With respect to the automatic expectation that higher quality more expensive equipment will last longer - well - wouldn't the analogous logic to that assumption extend to the earlier point about the optical performance of high quality refractors aren't going to be the same as Synta Tech refractors
Otherwise - as I keep on stating ad nauseum - if a Synta Tech ED120 was the same or even close to a TV-NP127 (for example) then companies like Tak, AP, TV, APM etc would have been out of business decades ago and we would all be using ED120s