Yesterday I finally decided to get out of the dusty shelf the trick that @arulbero came up with 4 years ago. I decided to try to expand 80-bit points to the 85-bit range. The expected solution time is 5 hours 35 minutes for GTX 1660s. 5 hours passed and nothing... I thought that this trick really won't work. But today I changed the jump table (as you hinted) and here is the result: on the first attempt the key in the 85-bit range was found in 6 minutes, and the second in 14 minutes.
Yes, old DPs can be reused if you keep old jump table, but they don't help much.
It's a good idea to use them for one next puzzle to improve chances a bit, but that's all.