You’re so close. What’s actually needed is that it comes pre-installed by default.

There a many traders acting as price finding mechanism for individual stocks. The situation you described is not so as evidenced by companies getting added to and removed from various indexes

But every buyer could get the source code because of copyleft, right?

Yep, they are not portable, every app should come bundled with its own interpreter. As to why, I think historically it didn’t target production grade application development.

Didn’t they already back down? https://www.sae.org/news/2023/03/european-ice-ban

You haven’t started your requirements. If it’s only tinkering for fun and cannot handle editing text files, then best avoid the Linux world.

The bigger ones are great for parties but that’s not an everyday event

They stand to gain nothing from making a proprietary platform

Others have given good reasons. I just wanted to point out that you are generally supposed to use a dedicated computer that is firewalled or, preferably airgapped. And never patch anything unless absolutely required.

You could try MX Linux if you want something performant and stable. It’s built on top of Debian and is easier to use.