You lose the running state, as if you'd pulled the battery out. I've had that only happen a few times, ever. Many applications nowadays recover from that. My ed

You lose the running state, as if you'd pulled the battery out. I've had that only happen a few times, ever. Many applications nowadays recover from that. My editor has recovery files, many of my games autosave, my web browser restores the session, etc. It is disruptive, yes, but it's rare enough that I just don't care that much about it. (And definitely not enough that I'd trade the speed of suspend-to-RAM for the reliability of suspend-to-disk.) (I've had far more issues with the physical connection between the laptop & the battery not being very solid anymore…)