To answer more seriously, I can think of a lot that would force me from my home. Environmental factors like fire, a tornado or something makes my structure unlivable, an opposing force greater than my ability to defend against, running out of essentials I need to live, family in danger at a different location. Probably a 100 other things I can't think of off the top of my head.
I prep for specific scenarios because it gives me a guide. You can't have a solution without knowing the challenges you are trying to overcome. But that's just for how-to purposes. I prep for the unexpected. For the freight train I never see coming. I hope that my prepping for scenarios applies across the board for that unexpected surprise event.
Evolution favors the adaptable. Those that adapt quickly and seamlessly will survive. That means having a plan b that isnt wandering around aimlessly digging through other peoples refuse for my kids next sustenance.
To that end I don't pidgeon hole myself with words like never. That being said, I am well prepared to stay where I am and also have prepared to effectively turtle out of sight and mind to let brief storms pass over my head.
My bug out plans are not as strong as I would like. They have also been complicated with a wife that probably could not handle some of the plans I had as a younger, single man and we are expecting our first kid this summer. However, my plans are there and are improving. Just like my stay-in-place plans as I continue to improve my property, develop relationships in my new area and train consistently. Not just with firearms but in many subjects.
Never say never. Always have a plan b even if it sucks. Continue to improve. Above all remember that adaptability and your ability to think combined with your ability to gain and store knowledge is the key to survival and "thrival" no matter what comes down the tracks.
Just my morning ramble