I disagree - I've upset most of the members on this forum at some point
I think the testa engine is a massive leap forward in terms of power and reliability. Maybe they changed their tooling, machines, whatever. The mechainics I've spoken to say they're much 'better' than the older engines. My 748R engine has an oil leak from the rear cylinder - on a 6500 mile engine. The response from the mechanic - '
they all do that sir'. The cure is to take it apart and build it properly.
That's not to say that the older engines are unreliable in any way, it's just evolution. Look at 1985 BMWs - still going strong, nothing wrong with them, but the latest generation engines are cleaner, smaller, lighter, more powerful and have longer service intervals. Ducati engines are the same.