I learned hiragana and katakana (sometimes mistake ke ge etc) years ago and I started learning kanji when I was traveling for my studies but now I don't travel anymore so I stopped.
My problem is I don't consume much Japanese media, I very rarely watch anime, I only play a few H games most of the time they get translated or I can translate them with mtool.
I don't plan on ever going to Japan for fun or for work so I don't see any reason to finish learning japanese