A lot will depend on how it's driven and what kind of mile's, lots of motorway miles mean not much clutch release/reapply which will help it to last longer, and also not trying to match the manufacturer's 0-60 time at every start also helps, but thats no fun!
Yeah I just wondered but as its out suppose I should change its got no idea if its any good bought the car as a non runner with a blown bottom end so looks like another bill oh well at least it will last a few years? was hoping with that mileage it would have been changed but hey ho
If it's out I'd change it. Often it isn't the clutch plate iself that fails but the release bearing or diaphragm spring that lets go. The last thing you want is to put it all back together to have to strip it all out again next year.
Unless they've been given a pasting old clutches often start dragging, not slipping and get progressively heavier which in extreme cases can wear the crankshaft thrust bearings out. All the weight you put into the pedal to move the clutch shoves the crank forward or pulls it back. I bought a diesel Bm on the very heavy original clutch at 230k miles, 5k later the crank was floating up and down in its main bearings, condemning an otherwse healthy engine.