https://github.com/D-Programming-Language/dmd
30 years!
It's sorta like our genes carry bits and pieces of the animals we evolved from millennia ago.
To read source code (and BBS messages) that you wrote in 1989 as a kid is quite a surreal experience, to say the least.
I got the code running, too, thanks to an email I wrote to a friend on said BBS describing in detail how to edit the code (using the AppleWorks word processor), recompile the code, and operate the BBS from the console. Without that 23-year-old email there's no way I would have ever figured it out.
Now I wish I knew better then to shove it in a cardboard box and forget about it for so many years. I could have made some serious $$$ from it.
The worst part was reading the source code and realising that, despite being written in Visual Basic, the alghoritms are actually smarter and better than something I wrote very recently.
"With great system resources comes a great carelessness about ones performance"