the leather will be still usable whereas the synthetics are "one crash only" type of thing.
Leather may still be usable. Also, one of the primary failure points is the stitching, which is synthetic. It can especially be a problem if the gear is older and dust has abraded the stitching for years, particularly if leather conditioner was used that is oily and attracts dust.
Synthetic can be repaired, which is why it's often worth it to go with a more expensive brand. I've had my Aerostich Roadcrafter for 25 years and it's served me well, though it aged out of their servicing policy a decade ago.
Leather may still be usable. Also, one of the primary failure points is the stitching, which is synthetic. It can especially be a problem if the gear is older and dust has abraded the stitching for years, particularly if leather conditioner was used that is oily and attracts dust.
Synthetic can be repaired, which is why it's often worth it to go with a more expensive brand. I've had my Aerostich Roadcrafter for 25 years and it's served me well, though it aged out of their servicing policy a decade ago.