DISCLAIMER: I am not advocating taking ANY drugs, especially not ALL OF THEM or the obviously horrible ones.
OK, as much as I hate to reign in on a thread of much agreement, I have a vastly different experience, or shall we say relationship with my brain chemistry; which I will attempt to analyse as I write this (DAMN NEXUS WHY YOU LIKE MY SHRINK??!! LOL).
First took ecstasy when I was 17, now 24 years ago (OMG!). Obviously loved it. [although THC/CBD, Nicotine and Ethanol were my first experiences a few years earlier]
Long story short: I became a psychonaut (and unfortunately later a drug addict).
To date I have tried over 70 different psychotropic chemicals.
I mention this because one of my psychiatrists said taking a variety of drugs a little is better than taking any ONE thing ALOT (this is a seriously respected/specifically into novel-substance addiction and harm-reduction guy, who actually wrote a book they all use on the subject).
This makes sense to me, as I make the analogy of a well oiled car rather than someone hammering nitrous into an engine till it breaks!
I have had, I will freely admit, horrible times in my life and have schizophrenia (diagnosed after 6 months abstinence from everything but nicotine and caffeine [and psych-meds] as per the psychiatric rule book), so please don't take anything I say as advocating my lifestyle will make you happy
...
BUT
I read about neurotoxicity.
I also hammered many many times [and weeks] (until literally twitching and shaking and crying in my room for two days) crystal meth.
I was addicted to crack and coke for years, and I liked HUUUUUGEEE hits.
I was a heroin addict (had to have some way to come down from all the other shit).
And all along I did all the club stuff, hallucinogens and more.
At one point I would go to raves on an average of 6 or 7 drugs at once, the funny thing being it became a problem in logistics to get all the gear I'd need for any given weekend!
Once I did a 2 gram line of a mixture of MDMA/MPA/MDAI/4-MMC!
I have obviously had comedowns.
Worst was crystal: literally a week of nastiness.
And one time something called 4F-MPH, an analogue of Ritalin, which left me for two days feeling like I'd permanently rinsed a part of my brain, and would feel BAD down forever. Strangely 1. it passed after a super hyped pep talk from a friend of mine and 2. of all of us who took that stuff only half had this effect, the other half said they had no real comedown at all!
HOWEVER...
I currently managed to quit everything but the odd K, 4-MMC, Amphetamine Sulphate, MDMA, LSD and Nitrous, but usually once a week only (and not all at once).
I also quit smoking (which I was a bad addict of).
I do get tired quicker than normal people, something which another doctor thinks could be a congenital low level of endorphins, possibly what made opiates attractive (and addictive) in the first place.
I'm now married and have a baby who is the light of my life.
I certainly don't advocate taking loads of drugs, in fact I want to teach to my son the opposite, with a dose of realism obviously.
But as far as neurotoxicity goes I should have melted my levels LONG LONG LONG ago.
I think neuroplasticity is a thing and I think it extends to chemicals. The brain is a dynamic machine both structurally and chemically, that's how it works.
It's possibly an error in logic to assume scaling up rat neurotoxicity experiments to the level of human neuroanatomy will yield the same outcomes?
Or maybe I'm some weird exception to the rules? (but I know in my heart this is not true)
I'm not saying what happened to all you before me in the thread is invalid, everyone finds life differently and experiences it in different ways.
When I take a stimulant I expect a comedown: this makes sense.
But I (personally) don't find the effect cumulative and neither do my MDMA using friends.
I not a troll I promise, but had to play devils advocate as this is my truth.
PEACE
LOVE
ONE
5D
PS: why would take drugs if you don't need to kids?
"Anonymous around the mouse, hyperspace black ops in my house,
A technical itch you can't ignore, viral like that magic spore,
Laced in life like a blockchain, special characters around my name,
They got game like Nintendo flow, it's always the same you will know,
I can't be pinned down like a Q-Bit, my architecture all neuromorphic,
On the roof if the internet had one, fire escape's fibre optic dragon." Onepacman