I guess the main obsession with PSS is that it uses common stove parts and easy to repair. Replacement parts are cheap and easy to find. 2 needle valves, $9.00. Replacement stainless burner, $10.00. 2 valve knobs, $5.00. Burner mixing tube, $15.00 short, $19.00 long. Getting to those parts to fix is easy too. That also makes it easier to clean
That said, that level of toughness isn't justified for everyone for the price or weight.
My Stansport Dual-Fuel stove was $36 and has given me seven+ years of solid service without a single hiccup. For the advantages in size, weight, and cost, I can (and do) carry a second burner which occasionally sees simultaneous use, and gives me a redundant cook system should the need arise (which it hasn't yet). The point is that there are a lot of ways to reach your meal-prep zen. "Cry once, buy the best" is an often-quoted bit of advice, but so is "the best is the enemy of good enough".