I just upgraded my square taper cranks ony BBSHD. The stock ones had rounded out and would not stay tight. I definitely haven't ever cracked one though!
"My Tarmac road bike developed a crack at just under 2 years old".
Have you heard of any expensive aluminium bike to develop a crack at just under 2 years old?
"If you damage your Roval product while riding within the first two years of ownership"...
The guy mentioned "just under 2 years" because there was a good reason for that.
My problem is that I cracked my front fork and Canyon doesn't have any in stock. And, of course, they use a weird tapered 1 1/8" to 1 1/4" fork size which NO ONE uses. Nice.