[toni-a]

With superzooms you have the problem of having too many moving elements and that's not good for the long term......
Maybe one of them is better as brand new but after some heavy use, it will join back the others in at best average peformance.
To my knownledge Canon 28-300 was one of the rare exceptions, an exception because the design per se with push pull and few moving elements , and an exception because manufacturer predicted this and it has shims to readjust elements in regular intervals