Writing
The first frame nobody checks
Resolve puts a punch on the first and last frame of an export. On a folder of stock clips, that's a problem you find out about late.

I export stock in folders. Thirty clips, sometimes a hundred, all going out at once.
Resolve puts a little zoom pop on the first and last frame of an export. If you want to know why it happens, I'd read the write up rather than repeat it here. What I care about is what it does to a folder of clips on their way to a marketplace.
What it costs
A punched first frame can get a clip rejected. That's the good outcome, because at least you find out.
The bad outcome is that nobody catches it. It sits in the library looking fine in the thumbnail, and the first person to really look at that frame is a buyer who's already paid for it.
What I used to do
Trim it by hand, or re-export. Trimming costs you the frames. Re-exporting costs you the whole render again, and you're doing it for a fault you didn't introduce.
Neither one is hard. That's the thing. It isn't hard, it's just there, on every clip, forever.
So I stopped checking
Here's the honest part. Checking the first and last frame of a hundred clips isn't something a person does. So I didn't. I'd catch the obvious ones and let the rest go out, and I told myself it was probably fine.
That's how this actually goes wrong. Not with a decision, with a quiet shrug that turns into a habit.
What I do now
It's a step before tagging. The clips come out of Resolve, they go through the fix, then they get their titles and keywords and head to the marketplaces.
It runs on my machine. It writes a fixed copy and leaves my original alone, which matters more than it sounds when the original is the thing you flew somewhere to get. And it isn't AI. It's deterministic, so it does the same thing every time, and I can check that it did.
Why it adds up
I've tagged 799 assets through MetaMule since it launched. That's about 133 a day.
At that rate, hand checking two frames per clip isn't a plan. It's a thing you say you'll do and then don't.
The change isn't that the fix got faster. It's that I stopped avoiding it.
Everything I mention here is on my gear page.