That is beautiful work! But I think maybe you asking this question suggests you're over the border and would welcome permission to leave it as is?
In which case, honestly it does look great like this. If it's not fun, you could totally stop. And let's face it, it's crochet, if you suddenly decide one day that it'd look better with a chonky border you can just attach some new yarn and go for it.
I am trying to imagine how the rows of this blanket would be formed. It looks like each row contains two different coloured fibers, and you're forming knots with one and just working the other fiber in? Forming the knot around the other fiber? And it looks like different rows are using different pairs of colour. So at the end of the current row you're dropping the two fibers and then picking up the fibers from the previous row and using those to start the next row?
It's a beautiful piece. I can imagine why you'd never want to do it again.
It is planned pooling as other people have mentioned. This is the yarn that I used. It's been about a year making this blanket. It's not as complicated as you describe, but the hardest part is maintaining just the right amount of tension. In total, I probably undid the whole blanket once or twice before I finished it, trying to get the tension perfect.