If you want to see exactly when your machine will hit this, I threw together a fish shell function that calculates the precise timestamp, mostly vibe coded.

calc_tcp_overflow_time.fish: https://gist.github.com/daveorzach/64538f82a89fa24e5d134557c...

monitor_tcp_time_wait.fish: https://gist.github.com/daveorzach/0964a7a67c08c50043ff707cf...