With proper maintenance, timing chains, cams and lifters, main and rod bearings should last forever(nearly). Once you have an issue with heat or contaminants, then the components start to wear and never stop wearing until they fail. There is nothing you can do to stop the wear once it has begun.(aside from replacement of said failing part)
It is, however, a good idea to inspect the timing chain and gears if you have access to them. If there is minimal play, then don't worry. If the play is excessive, replace.

 

Exactly.
Mine has 205k on it and runs great, old Buick engine it is not anymore, it has been upgraded many times and oils are better now at protecting wear than they were even 10 years ago.
A well maintained engine should last damn near forever.
Even a abused one will last 150k.
Rover engines are no different than a Chevy or Ford push rod engine, they all have the exact same parts the only difference is where they were made.
Racing engines wear different than daily drivers, higher RPM, longer run time at high RPM, more heat, more load, more extended load, etc.
Comparing apples to oranges with the daily driver compared to the racing engine.

 

That had a timing belt didnt it?
I agree that the non free wheeling interference engines are a bad idea, almost all overheat cam engines are that way.
The timing belt breaks and the crank and pistons continue to move but the came and valves stopped where they were when the belt broke, the pistons come up and smash the valves and either bend them or punch a hole in a piston or two.

 

Nope, timing chain, with a recall no less.

NHTSA Recalls Saturn L Series

 

What was the recall for?

 

The TSB on the Saturns was for a defective timing chain.
No love from GM either from what I read, it broke and it was all on you.