I started using Linux containers long time ago and I have used it to achieve compatibility and ease of use. Before LXC was introduced it was somewhat painful t

I started using Linux containers long time ago and I have used it to achieve compatibility and ease of use. Before LXC was introduced it was somewhat painful to manage multiple environments using chroot, managing network, etc. But running the same software in a single environment wasn't always easy. You had to take care of different software versions. And it wasn't uncommon for things to break frequently because of that. While things like python venv, ruby rvm, etc. helped dealing with it, there was no universal tool for whole filesystem environments besides virtualization. When LXC came out, I started using it for everything. Nowadays I use LXD and sometimes Docker and it is so nice and requires minimal effort. I know that without those tools it would be very inconvenient to manage my own servers. I have separate auto-updating containers for everything and if one thing breaks, it doesn't take everything down with it. And when everything is contained and each system has minimal set of packages set up, over the years rarely anything ever breaks. And let's not forget that these Linux features also enabled the universal packages (flatpaks, snaps, etc.) which make it easier for Desktop users to get up to date software easily. Of course I know that it is not virtualization. But why do people say "containers are not really containers"? It still contains different environments. No one said it is about containing memory or something else.