Interestingly, as I understood it, when a release such as Xubuntu goes out of support it does not stop getting updates that are not specific to that respective flavor, so in a way you still have some indirect support, but feels a bit like a gamble.
Over the years, I have developed my notes and scripts to configure quickly a newly installed Xubuntu system on a new computer, so that everything works in the same way as on my old computer. Since I stick with the same brand of laptop (Thinkpad X1 Carbon), I do not feel any difference after the configuration, except that the computer becomes more powerful. I do not want to spend my time on adapting myself to a new system or a new computer.
Buying a new laptop so frequently may sound a bit expensive. It is indeed not if you spend so much time on your laptop as me. A more powerful laptop means that I can finish my work (e.g., numerical experiments) in (much) less time. In this sense, my life is prolonged. This is the only case I know that a common person can effectively trade an affordable amount of money for a longer life, as I often tell my students.