

My personal preference is to use FOSS whenever it’s practical. For home use, I’ve switched to FOSS for the vast majority of my computing needs. I run Linux on both my server and desktop. Most of the software on my server is FOSS, with the one exception being a container using the Splunk free license. My desktop is running Linux, and I use LibreOffice for documents and the like. I do run Visual Studio Code, which is technically Open Source, though I would not put it past Microsoft to do a rug-pull on that eventually. And I have an extensive library of games with Steam, basically nothing of which is Open Source.
I have reached a point, financially, that piracy is not morally defensible. And I’m not willing to get into the mire of if, or where such a line would be. I believe that creators should be rewarded for their work. Though, I also agree that the limits on copyright are way out of whack with the changes Disney has purchased through the years. So, piracy as a moral question is a murky subject, with no clear answers to me. But, the end result is that I buy games, movies or TV shows. For other software, I usually look to FOSS projects (e.g. Gimp vs Photoshop, FreeCAD/OpenSCAD vs Autodesk), free licenses (e.g. Splunk) or just do without. For TV Shows/Movies, if it’s not on one of the streaming services I subscribe to, I may buy it via a digital service; or, I do without.
The short answer is, it’s what we were taught in school. Like many preferences, it’s shaped by the culture we grow up and live in.
Of course not, you were raised and live in a different culture; so, your preferences are different.
Ultimately, the right answer is ISO8601. It’s unambiguous and sorts well on computers. But, I don’t think any culture is teaching that as the primary way to write dates, so we’re stuck with the crappy ways.