My KSP career did not end, it's on hold, large part count ssto spaceplanes, refuel stations with multiple docked ships and bases are making the game too slow to play. Specially in Minmus, which is my stating area for launching, refueling and ending interplanetary missions. No point in expanding large part operations to gilly or Jool's low gravity moons. Until full use of the CPU cores, GPUs (SLI) and RAM (64 bit) is available in the 1.1 version with unity 5 or even further releases, all operations are small and medium ship design and testing.