I can tell you I wrote many useless things with more than 500 lines, also known as "enterprise software".

I could write a fairly useless program with nearly half the amount of lines!!:

https://github.com/egeozcan/gifDisco

Being able to write silly stuff because you can is immensely satisfying.

For that you can go savor the archives of IOCCC : https://www.ioccc.org/

I can write useless programs in 0 lines!

The probability that a program is useful given the number of lines probably peaks in the 10,000’s-100,000’s.