I suggest reading (or listening to) How to Change Your Mind by Michael Pollan. It's about psychedelics. I've gotten back the experience you're talking about whe

I suggest reading (or listening to) How to Change Your Mind by Michael Pollan. It's about psychedelics. I've gotten back the experience you're talking about when microdosing psilocybin... and it's not just limited to programming. Remember when you went to a new place or met someone interesting or got to play with a new gadget? You probably remember it as a vague memory but can't recall how it actually felt. It's possible to get it back, to a certain extent anyway.