What you're describing is called fixed point arithmetic, a super cool technique I wish more programmers knew about.
Proper finance related code should use it, but in my experience in that industry it doesn't seem very common unless you're running mainframes.
Funnily enough, I've seen a lot more fixed point arithmetic in software rasterizers than anywhere else. FreeType, GDI, WPF, WARP (D3D11 reference rasterizer) all use it heavily.
I don't agree at all, Xen was my favorite part of Black Mesa and my least favorite part of the original Half-Life. I was blown away by how good they managed to make it look (with a 2004-era engine, albeit with updates), it's absolutely gorgeous. The gameplay and puzzles were far more fun for me too, and I greatly appreciate that they made this part of the game longer.
Why do people care so much about doxxing these days?
In most places, doxxing is not illegal. In the places where it is illegal it's usually only when there's stalking/harassment intent behind it. Doesn't appear to be against the HN rules either.
Ah yes, well known very complex computer engineering problems such as:
* Parsing JSON objects, summing a single field
* Matrix multiplication
* Parsing and evaluating integer basic arithmetic expressions
And you're telling me all you needed to do to get the best solution in the world to these problems was talk to an LLM?