Why is choosing ubuntu distro and version important?
So we have distros like Ubuntu, Kubuntu, Xubuntu, Lubuntu, Ubuntu MATE... Also we have LTS and other versions inbetween.
I understand they have different desktop environments with whatever comes with that like file manager and so on. I have installed several into virtualbox just to see what they look like and even installed on the unity one cinnamon and xfce. So is there a reason to choose a desktop environment in advance other than ease of install of the DE and components? Why isn't there a combined image where you can choose the DE during OS install?
I understand that there is LTS every 2 years supported for 5 years and non LTS twice a year supported 9 months. But why is this important? What does support mean? Can't you just upgrade without reinstalling?