I was primarily a 4-string player a few year after I first started playing the bass. I even remember selling the 5-string I bought years ago, because I just couldn't get use to the b-string.
However, after time and a lot of practice, my skill level and knowledge of playing the bass increased greatly. I bought another 5-string and there was absolutely NO transition period. I played it like I've been playing 5's all my life.
Been a 5-string player for many, many years now. And although I still have 4's and love them, I will always, from here on out, play 5-strings predominately. Once you achieve that comfort and experience with them, there are simply more possibilities you can achieve with them, IMO.
Just switched to a 5 (that I like) last month and took to it like a fish to water

