Note to readers, before you try it you should know the difference between ecstacy, molly/mandy and MDMA. The drug you want is MDMA. Do your research[0] and this drug will be safer than climbing a mountain or something (and way safer than alcohol). Very few people have actually died from this drug but you should understand why they died.
Safer in terms of the risk of death, sure, but there seem to be other risks involved.[0] That paper doesn't necessarily disagree with anything in the page you linked, and it's pretty old now. I just want to emphasise that it's not a simple decision to make.
It seems that heavy usage over time would do damage. That seems fairly obvious, to be honest. What would be surprising is if a single dose had long lasting negative effects.
You have to also consider that people like me are essentially broken. Being completely unable to socialise with people puts you on a path of loneliness and misery. Maybe curbing some of my brain's "abilities" is exactly what I needed. I've often noticed that stupid people are happier.
I didn't become stupid, though. If I became stupider then it doesn't matter because that is completely offset by being more able to apply my skills properly. There's no point being a genius if you can't communicate with people.
Note to readers, before you try it you should know the difference between ecstacy, molly/mandy and MDMA. The drug you want is MDMA. Do your research[0] and this drug will be safer than climbing a mountain or something (and way safer than alcohol). Very few people have actually died from this drug but you should understand why they died.
[0] https://erowid.org/chemicals/mdma/mdma_basics.shtml