not true. well, it kind of is if you don't configure your vim "right". any sensible configuration I've seen includes the "set hidden" option which will enable y

not true. well, it kind of is if you don't configure your vim "right". any sensible configuration I've seen includes the "set hidden" option which will enable you to switch to another buffer w/o saving the current one. w/o this config option vim is barely usable imho.