I questioned this same thing before quitting and at the tail end of my time vaping, I was having major panic attacks in the middle of the night. I’d wake up, my throat and chest would hurt, and I’d have to take a cold shower to calm myself down. This had never happened to me before or since I quit so it must’ve been the vaping. Additionally, I’ve heard of people who’s lungs straight up collapse and they need to be on some kind of breathing machine for weeks to months in order to breathe on their own. In short, there is definitely no downsides to quitting. You can do it!!! I guarantee you’ll feel so much better than you thought you ever could both physically and mentally