Me neither. PWO typically stands for post-workout. The title doesn’t imply anything about a pre-workout supplement. “Never Hold a Pump” sounded like a warning about the dangers of holding a pump. But, okay… [edit, snip, tuck, trim] … all better.
On topic, the pump will depend on a bunch of factors - hydration, workout nutrition (especially carb and sodium intake), the actual training you’re doing (volume and/or TUT), etc. It’s almost like DOMS in that some guys never get a pump and see results just fine, others get a pump and that’s the highlight of the day with no other real progress made.
If/when I do get a decent pump in a bodypart without specifically trying or designing a plan to optimize it, it’s generally gone maybe a half-hour or so after training. No big deal.