Without starting to calculate, or looking at the code, I’d say it’s obvious that an investment strategy where all of a month’s contributions are made on the first day of the month will be superior to one where you spread them out. Also, an investment strategy of making the month’s contributions on the last day will be inferior to spreading them.

So it’d really depend on how you time your monthly investments. If you can invest as soon as you get your monthly income, that’s probably the most beneficial way to do it.

edit — Taking a quick look at your code, that’s exactly what’s happening. In each period, ChatGPT invests first, then lets interest accrue, whereas you let interest accrue, then invest.

You could always try NixOS.

Arch may not be particularly easy to use, but it’s a simple system, in that you can build a mental model of your entire setup with a fraction of the effort and time that you’d need to expend with other systems. It gives you the standard Linux experience without fuss, or handholding.

Nix, however, gives you several capabilities that other systems won’t, but you’re paying for that through its learning curve.