alt Hacker News> It's YOUR computer, you can put YOUR software on it. In fact even pocket calculator do that.
I'm pretty sure this exists. It's called OSS or, more ubiquitously, Linux.
The problem is, of course, no one wants to publish software for your PC/handmade OS. Which makes it a huge problem. You can't write every piece of your OS, without wasting huge amount of time. Nor do people generally want this.
OSS/Linux is "our" software. It's made by us for us (or others if you don't contribute).
Your software can be made by you, for you. It can be open source/free software if you want. Others can contribute to it, if you want but it can be open source without accepting external contributions also.
My point was to highlight that having software made by you for your machine is not new. Arguably the way to do so changed but I would say the principle remains.