I’ve been using linux mint on my desktop since 2015… the same 2015 distribution. It still runs on python 2. I can’t even upgrade it to python 3 because it would break the OS, so when I have to do any kind of work I have to install python 3 in a virtual environment.
In the last year of my PhD (2016-2017) I wanted a laptop to write my thesis in the library, but I didn’t want to spend any money. So I took my old 2006 Dell Latitude with Windows XP, replaced the CPU and upgraded the RAM, and put Lubuntu on it. It could hardly connect to the internet, and basically the only app it had on it was LaTeX, but it did the job lmao.