BitWarden is now my password manager. I had been using 1Password and that worked well enough, 1Password has a better user interface in many ways than BitWarden. So why switch?
BitWarden is cheaper, and has a free version which is pretty cheap! That in itself wouldn't have been a good enough reason. BitWarden I find easier to structure the hundreds of secure notes I have, one can have folders inside folders. That was a definite plus. It made it sensible to split up some of the secure notes I had.
Switching did force me to prune out dead records, and reorganise what I have. I wouldn't have done that unless I had been switching.
Some points with BitWarden. You have to notice which BitWarden area you're connecting to. Sometimes the user interface doesn't update as it should until you save again for instance when moving secure notes between folders.