It is exceedingly common that a trip will alter a person's perceptions permanently. Such changes likely were the direct result of having taken the substance, and wouldn't have happened otherwise.
Without knowing your specific circumstances, another thing to consider is that it's possible that didn't have a scientific approach to measure the precise mass of LSD that you ingested for any or all of your trips. Perhaps you were "lucky" in the sense that you never (inadvertently) received an extra strong dose. And, your biochemistry might be more tolerant to LSD.
Dosage affects everyone differently, hence the current wisdom to play it safe by scaling up dosage systematically.
I have tripped around 20 times in total; most around 100-200 range with a few around the 300-500 range.
And while I can never know the actual dosages of it when you buy it the way you do my experiences are pretty consistent with how others report their experiences around those dosages.
I am however not a person who is deep into the philosophical aspects of hallucinogens so for me it is about having a pleasant experience and not to try and learning something about myself.
It could be that I'm one of the exceptions or that I don't realize it but to be honest as common as tripping is I don't see many changing their life or outlook after a trip.
We may have grown up in different eras. Everyone I know that has dosed is permanently different, and they all self-recognize this change as being permanent.
Without knowing your specific circumstances, another thing to consider is that it's possible that didn't have a scientific approach to measure the precise mass of LSD that you ingested for any or all of your trips. Perhaps you were "lucky" in the sense that you never (inadvertently) received an extra strong dose. And, your biochemistry might be more tolerant to LSD.
Dosage affects everyone differently, hence the current wisdom to play it safe by scaling up dosage systematically.