Companies that get an "exit" are mostly designed to do that, including literally every VC funded company. If you're working at a startup, you probably know if it's one that is being built with the goal of an exit. So, like it or not, if this is what your company is for, it's a win (barring a liquidation or aquihire) so it should be celebrated. Rarely is it the end of an era, it's literally a destiny.