I plan on a clutch lasting at least 50K miles more. I also consider a clutch to be normal maintenance, expensive as it is, so it is a no-brainer for me to get it fixed. You don’t provide an overall assessment of the vehicle, so I don’t think we can estimate as well as you can as to how much longer it will last. If nothing else is wrong, my 50K estimate is probably low. Mostly, it depends on how well you have kept up the rest of the vehicle, an unknown to us here in internet land.