I'm glad I did! But never say never. I worked in the industry with Java, C# and SQL and Python for six years before I did my PhD and started working exclusively in Prolog (almost - I do a bit of plotting in R on the side). Even outside of academia, there are opportunities to work with Prolog- though you will probably have to try harder than usual to find them, and maybe have to make those opportunities yourself. I encourage you to try if that's what you want.