Hello everyone! My first post here, though I have lurked for a while, and I am grateful for this community.

So I started meditation about 6 years ago (2014) and kept up a very consistent practice up until about 3 years ago (2017) when I went on my first and only 10-day Goenka retreat. I was doing solely vipassana practice for about 30 min-1 hr a day prior to the retreat, skipped next to no days.
During the Goenka retreat, nothing notable occurred. I think I was honestly struggling to maintain a stable equanimity amidst the pain and racing thoughts throughout the retreat, so I went back to my "normal" life thinking nothing of it.
A few days after returning to grad school, I ran into a horrid horrid Dark Night. Physical heaviness that made it difficult to move and breathe, like there was a weight on my heart/chest, and a pervading sense of meaninglessness in everything. After a thought to go do something/anything, the immediate next though would be "well what's the point? the feelings I get from doing this thing will not last, so might as well do nothing." There was a complete lack of focus/concentration. I could not read two sentences without feeling like I needed a break. I could not find the motivation or will to do anything, and eventually ended up dropping out of grad school because I was drowning in work and could not bring myself to do any of it. This was very unusual for me.
This Dark Night lasted about 1.5-2 solid years, until I somehow managed to come out of it WITHOUT a consistent practice. I have been working as a school teacher for the past 2 years without a daily practice, and it seems as though I am progressively becoming more and more equanimous, which I find strange considering many who stop practicing are said to slide back into prior stages of insight.
It seems as though my suffering has vanished, as though nothing can bother me. All of my bad habits (weed, masturbation, junk food...) seem to have ceased without my conscious involvement, as if there is no attachment to anything. I am losing more and more attachments and becoming more and more free as time has passed this year. It seems as though the world cannot sway my sense of inner peace/freedom.
It simultaneously seems like my sense of self, or ego, is eroding, and I can track this. I have less preferences, less judgments, less thoughts, more space. Things just "are" and there is a general okay-ness about everything.
My question is: how can this be? I would expect to be cycling through Dark Night territory from lack of consistent practice. Am I mistaken about being in equanimity territory? This is definitely a state of consciousness that I do not have experience with before: so free!! I have not practiced all year and this state has remained, and is evolving for the "better."
This isn't a concern, but I guess I am wondering how to be using the maps to apply to my situation (are they 100% reliable?), or if anyone has any insight about my current situation. I still have Dark Night PTSD and would dread having to revisit that level of misery lol (*half joking*)