We all change on a daily basis but I think certain pills are one buzz and certain pills are another buzz. The more you can understand the better. I just wish there was more test analysis above and beyond ecstasydata or streetworx.
For this to be true though you would need to
completely forget about set and setting.
Take LSD for example. I had a vial of VERY high quality LSD for a while, it was all the same batch, and I tried it a good 50+ times throughout 6+ months..... every single experience was completely different from the last. Some trips were extremely euphoric like MDMA, some were extremely visual, and some had me communicating with entities from other galaxies....
Now, MDMA isn't quite as psychedelic so it won't have the same variety of effects.. but I've tried MDMA from the same batch multiple times with widely different effects as well. Sometimes I'm floored the fuck out, sometimes I just can't help but dance all night. Sometimes it's an extremely introspective type of love for myself, and sometimes I can't help but tell the person I just met how much I love and care for them..... set and setting are extremely important man, as well as what other drugs you have been taking recently (tolerance) and even diet and how much sleep you get plays a large effect.
I don't think you're ever going to have two experiences that are exactly the same.
it's fun to theorize but isn't it more logical to assume that the people taking the drug have changed, not the drug itself?
Indeed. Sure, we all like to debate how MDMA production techniques might have changed since then, and sure it's probably had some effect.... but you really need to think of Occam's Razor in a situation like this, and what's the easiest way to explain this??
Downregulation would be the answer to that question... especially since we already KNOW it's happening, as 5-HT receptors downregulate naturally over time anyway.