Which purpose should the rack have?

Which role should it take in the whole gear-setup?
-- VONDENFUNKEN

Yeah, good question...
I would have answered this question much differently a year ago and might have a new perspective next year.

TLDR; I want to be able to sound design and have some paraphonic (mostly analog) voices through Eurorack. Im not overly caring about sequencers/drum modules in eurorack due to existing pieces I have, but would still get anything that demanded itself. I want the ability to continue to learn 'synthesis', hands-on -- I have the entire Arturia VCollection (love it, but want the workflow/experience of hardware). I want (the option) to re-perform my compositions' individual tracks in Ableton through my rig and spice them up with different sound(s), texture(s), modulation(s) and or effect(s).

Edit: reperforming tracks (midi or audio) -- I am also very curious about bi-directional CV communication between my PC and synths, but haven't gone down that rabbit-hole yet, but an ES-8/9 has my attention.