Chemically speaking, pure methamphetamine is pure methamphetamine. Full stop.
People seem not to realize that our brains downregulate various receptors responsible for pleasurable and intense experiences with age alone. Much less with active use of compounds like meth.
It also goes beyond simple biological tolerance/effects. Your consciousness itself becomes accustomed to experiences, especially pleasurable ones. ESPECIALLY with age.
Many people conflate the experience of youth itself + L-meth heavy street meth and staying up for days with no appetite with an actual quality high. People genuinely LIKE body load and PNS stimulation, they just don’t realize it.
Pure D-meth is more pure, cleaner, and more available than ever before. You’ll be able to eat with it, you might even get some sort of sleep.
The thing is, people are silly. Nothing could possibly be better than what felt good, when they were first doing it. Not to mention even the average modern young, non-drug-user’s brain is so fried via shitty hits of pleasure via electronic devices, food, general habits, it’s already depleted of neurotransmitters.
I never even really habitually used amphetamines, but I did get the chance to experience them pre-smartphones and post-smartphones. All while still young with a relatively virgin brain. ALL drugs became less pleasurable and intense after habitual smart-device use became such a common practice. Especially stimulants.
I think most of this is highly applicable to nearly identical discussions about MDMA. It’s more pure and available than EVER, yet you have people insisting their undoubtedly adulterated, untested pills from the 2000s (which were categorically more dirty) simply HAD to be better than the pure MDMA crystal of today.