A lot of complainypants in the comments you linked talking about how it cannot be done. It seems to me when people get introduced to MMM/ERE they focus on the math. Some scenario like:
-Save 25 to 33 times your annual salary then never work again.
Then this elicits responses like: What if everyone does this? It won't work.
I think this is how most people see the FIRE lifestyle, but there is an equally important other side to the Mustachian coin which encompasses in sourcing things and learning to disconnect yourself from the consumerist machine (or whatever you want to call the standard western lifestyle). Personally, I didn't fully understand this side of the mustachian coin until I read Early Retirement Extreme and it was laid out for my analytical mind. Now I have gone whole hog on riding my bike, shopping for sales and then cooking with what If I found, learning how to do almost everything for myself, etc...
I now believe I could live off of $7,000/year if I set my mind to it.
Of course one can skip this side of the coin and just focus on the math and save a shit load and pay everyone else. But, I consider that sort of missing the point and very dangerous to boot.
Anyone have a similar journey?