I can't wait until someone does this, then autofills 50k rows down, then gets a $50k bill for all the tokens.
Reminds me of when our CIO insisted on moving to the cloud (back when AWS was just getting started) and then was super pissed when he got a $60k bill because no one knew to shutdown their VMs when leaving for the day.
If someone is processing 50k rows, that means they found real value and the UX is working. That's the whole point.
Also, 50k rows wouldn't cost $50k. More like $100 with Sonnet 4.5 pricing and typical numbers of input/output tokens. Imagine the time needed to go through 50k rows manually and math doesn't really work for a horror story.