I think “end support” in the title is misleading. From the article:

Based on Apple’s warning, you can expect that macOS 27 will drop support for all of these legacy machines, and therefore macOS 26 will be the last compatible version. These devices will continue to receive security updates for another three years, however.

Unless your parents want the latest features they’ll probably be fine for a few more years.

If I had a Rappen for every time I’ve heard this joke I’d actually be as rich as you all think Swiss people are.

It’s not the privacy of the content we’re discussing, it’s the horrible Discord client that keeps datamining your PC. It even inspects all the processes.

I agree that Discord isn’t a good choice for FOSS projects for various reasons including privacy, but can’t you just use the web client to avoid that specific issue?

What I really like about Obsidian is that it stores your notes as plain text/markdown files on your computer. So you always have access to them, even without Obsidian itself. Markdown is also a fairly common format, so it shouldn’t be too hard to move them somewhere else later.

But your concerns are still valid and I generally also prefer free open source software.