So any particle system I drop into the Scene view in the editor does not play. Even creating a default one right from the menu doesn't play (not in the Particle Editor window either). I've noticed the Particle Effect little preview window has changed and now has a "Restart" button. Underneath of it is a value called "Playback Time". This value is 0 by default. If I scrub it, the particle system does play the proper particles. What is going on with this? Is this user error with something? It's always been that when I create a default particle system (from the main menu) into the Scene view it plays.