I still work on remixes, but very sloooowly. Like others I do it for fun. I am 32 now and life has more to it. Wife, kid, house, full-time work, and a part-time PhD. Half way done with the PhD. I still run a small sound design company to make some extra spending money. Selling original synth patches and doing factory soundbanks for companies on occasion.
Musically I am super happy and feel fullfilled. I am glad I do not rely of music for a living. I do it for fun and make some extra money. I realized years ago I am much happier with a consistent paycheck at a low stress job. For me, relying on music for income killed my passion for it.
Success is a deeply personal and subjective thing. You just need to find out what it means for you.