good for 30,000 rounds/ of what?
First off, there's a bit of difference between standard ball and some +p++ stuff run by Navy Seals or somebody....else who doesn't pay for their gun or ammo out of their personal pocket.
SO, part of the question is what is going to be run through the gun. Next part is how it will be maintained. Spring changes (or other parts) on a schedule of rnds fired is different from shoot it till it stops working.
Lastly, why does it matter, to you?
Service life /longevity are issues of concern when you are equipping a military with tens of thousands of pistols. Might be a valid issue with a major PD looking at buying hundreds of pistols.
When we're looking a 1 or 2 personally owned guns, not so much.
How many times the cost of the gun are you going to spend on ammo to get to 30,000 rnds? 2? 3? more??
I wouldn't choose a particular gun because some version tested good to 30k and somebody else's model went to 40 or 50k rounds. That's irrelevant to me. I'd pick what I pick based on other factors, because in real terms, anything that isn't absolute junk is going to out live me, anyway.