Residuals are a rather fantastical compensation mechanism when compared with other industries. Imagine if software developers kept receiving a paycheck as long as the company was still making money from your software.

Marc Andreesen would still be getting residuals from Firefox for code still around from the Netscape Navigator days. Similar for Windows 95 code in modern Windows. https://retrocomputing.stackexchange.com/questions/14229/is-there-any-code-in-firefox-as-of-2020-that-comes-from-netscape-navigator

Is there any code in Firefox (as of 2020) that comes from Netscape Navigator?

Inspired by comments on the previous question Is it true that Netscape Navigator eventually became Mozilla Firefox? (Answer: Yes). In 1998, Netscape released a large amount of their existing sourc...

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@carnage4life Then again software developers get stock options (or grants), which is better than the $0.07 checks the screenwriters I know get every quarter. And to some extent Andreesen's entire career has been a residual from the Mosaic/Netscape days.