Depends on what tone you want. Like warmer sounds work better with older strings I think, but you can't really get a bright tone very well with old strings. So stuff like slap, and in genres like metal where you want a very bright, often distorted tone, you definitely need new strings.
I personally like older strings better cause they sound more round and I like softer tones. Btw your playing is superb, especially your tapping. I feel inspired to slap da bass now.
