Like anything, it depends.
In one hour:
This:
To This:
And does this look shiny to you? 4 hours...
Or maybe you like .45 ACP's? 4 hours...
See, Grandpa done good. Best he could.
Daddy done better. And it was better than Grandpa's ways.
But Sonny is doing best with today's ways.
Things progress. That's why we aren't pouring black powder in a muzzle, and pounding a ball down on it.
Things change.
And admittedly STM isn't for everybody. It is a big hit in the budget.
But think in decades of use, and decades of not changing media, and decades of clean anything you run in it.