2000-04-06 Joel Spolsky
Netscape … [made] the single worst strategic mistake that any software company can make:
They decided to rewrite the code from scratch.The reason that they think the old code is a mess is because of a cardinal, fundamental law of programming:
It’s harder to read code than to write it.
https://www.joelonsoftware.com/2000/04/06/things-you-should-never-do-part-i/