5k likes of code a day is 10 lines of code a minute solidly for 8 hours straight. Whatever way you cut that with white space, bracket alignment, that’s a pretty serious amount of code to chunk out.
Not all my 5k lines are hand-written or even more than a character; a line can be a closing bracket etc. which autocomplete has handled for the last 20 years. It's definitely an achievement, which is why it's important to get clarity when folks claim to reach peak developer productivity with some new tools. To quote the curl devs, "AI slop" isn't worth nearly the same as thoughtful code right now.