It’s always been possible to rewrite it; LLMs just made it possible for people who don’t understand it to do so. I personally don’t see that as a benefit, but you do you.

As to the age statement, why on earth does that matter? HAProxy launched in 2001, and despite it being 25 years old, you’ll struggle to find anything faster or more stable in its field. Then there’s, you know, Linux - 1991. I suppose you want to see it rewritten?