As for our sound, it mostly comes out of the laptop. I just mute/delete a channel and play that part over the top. When we went to Germany last year all I took was the Rocket, Monologue and a KeyStep. Even then, the Monologue was more for show than anything. About half of what I played was on the PC, I only used the Monologue and Rocket on a couple of songs each. I went through the same whittling process and decided there was no reason at all to take the Ultranova or Minilogue, which meant my entire set up, laptop and all, easily fitted into a carry-on size Pelican camera case (or a cheap Chinese knock-off of one, anyway).
I've always done that. In the old days, every new purchase had to replace at least two existing things (personal rule / financial constraint), which meant reprogramming all my songs from scratch every couple of years. I just couldn't afford to be sentimental about anything, as long as a new sound did the job, that's all that mattered. Of course, more often than not the new sound was better than the old one - why buy something new if it's not going to do that for you - so it was mostly a positive experience. If all you ever try to do is remake the old sounds, you stagnate. I've always wanted my/our sound to be dynamic and evolve over time.do you go "its a bass, its close enough" and not worry about exact replicas of sounds?