When I solved #125 I gave up because it became boring. I thought someone else would solve #130, but nobody did it, so after a year I started again and I spent about two months to solve #130.
Yes you can use old DPs to solve next puzzle, it helps a bit.
I will try to finish solving #135 in 2025.
Lol, it became boring?! you are saying this as if it was some kind of hobby that you did. It was over $500k and now It's $1m and you got bored ''solving'' and stopped??! Are you billionaire or something? Or are you just the creator of the puzzle that is messing with us lol, this can't be real. Something is fishy here about this person. Not just fishy but VERY fishy. Is this the son of Elon musk or something? We need clarifications from others!!