Then it looks like starlink is the single only ISP that does that. Doesn't change the fact that data caps are dumb though.

Not true, when you exceed your cap they charge you an arm and a leg for each gig past your limit. I wouldn't be surprised though if they don't also shackle your speed in addition to charging way more simply because they're all greedy assholes.

Data caps have absolutely nothing to do with when the data is used. This argument is nothing but an excuse. Think about it this way, data caps refresh on a monthly cycle right? Well it works that way for everyone. So when a new month rolls around everyone gets 1TB or whatever and starts using it till it runs out. That means a ton a bandwidth is used at the start of the month and very little is used at the end of the month. ISP's are just using data caps as a way to justify squeezing more money out of people. The bandwidth doesn't matter at all to them because slower Internet speeds at peak times are going to be the same for them with or without data caps.