It's amazing how slow the development community en masse has been in "discovering" containers. I remember I worked for web hosting company that offered containers as a web hosting solution back in 1999, I then ran my own little host offering FreeBSD jails and then Linux containers (based on the excellent Linux-VServer project) in 2003, and I do remember how when I tried to explain to (pretty technical) people how this is way more efficient than stuff like Xen they'd go "but it's a hypervisor..." (as if that meant "magic"). I eventually gave up on it and sold my little hosting operation because it was too much work and not enough money, it looks like it was about 10 years ahead of it's time.