Not only the next one.. 80 bit DPs extended to 90 bit range:
But of course there is a limitation here and it depends on the number of accumulated DPs.
Let's say, 95 bits I will not be able to solve with the number of DPs that I have.
Exactly. If you solved #80, DB with DPs for it will help only like 5-10% to solve #85. But if you have huge x10 DB for #80 you can solve 80-bit range very quickly and also crack #85 much faster, and even #90 will be solved a bit faster. But for high-number puzzles probably you don't have x10 DB.