They should last for many years. But what is more likely to wear out first?
1. The threads on the 510 connection?
2. The springs (i.e. for the button), hence the magnet upgrade?
3. The threading on the tubes themselves?
4. The switch/button mechanism itself and/or locking ring?
Stainless steel is supposed to be harder/stronger/more durable than both brass and aluminum, but even it will strip eventually, I think. Perhaps titanium would last longer.
1. The threads on the 510 connection?
2. The springs (i.e. for the button), hence the magnet upgrade?
3. The threading on the tubes themselves?
4. The switch/button mechanism itself and/or locking ring?
Stainless steel is supposed to be harder/stronger/more durable than both brass and aluminum, but even it will strip eventually, I think. Perhaps titanium would last longer.