1. The path to becoming rich puts them in a social class that warps their view of what matters and leaves measuring themselves against arbitrary hierarchies of their own making.
2. The path to becoming rich in modern society is such that the kind of people who would commission RISC-V implementations or security audits of popular open source software or cheap medical interventions simply cannot succeed. It may require too much of a compromise of those beliefs to actually win.
Some of the robber barons did some interesting eccentricities like Carnegie libraries.
The Long Now clock is the most recent thing I can think of.
Maybe they could attract more dollars to their projects by naming them after the main benefactor...
https://www.vox.com/2015/8/12/9140477/google-alphabet-larry-...
Bill and Warren are engaging in philanthropy, which is equitable and far more commendable than my suggestion.
What I am suggesting is simply individualist exuberance outside the normal tangible goods and conventional arts.
Obviously it's not file systems or whatever, but he's definitely pushing the "definitions of art" for stuff he's interested in. Helps to have your own museum.
[0]: https://en.wikipedia.org/wiki/Museum_of_Old_and_New_Art
[1]: https://mona.net.au
People are doing this kind of stuff, just not always in a way that we nerds find interesting.
I would like to orbit durable messages around each of the inner rocky planets such that they form a "Burma Shave" style rhyme, similar to this:
Life can take a nasty turn,
If you try to pee
In a transfer burn.
Kodos toilets, for zero gee!
Alas, I am not absurdly wealthy.