I'll say from my experience with Pam's: It's obviously great for clocks, it's great for tempo-synced LFOs, and it's good for ostinado rhythms. The deeper you get into "Pam's as a sequencer" the worse the user experience gets, though. It's super powerful, but with only one button and one encoder, navigating the module is pretty uncomfortable in any kind of live scenario (whether that's performance or just jamming in your practice space). It works best as a "set and forget" module. You can set it to something very complex, but making changes to it is slooooooooow and hard to do in a way that matches the musical structure. Like, I can sweep a filter or a VCA gain knob slowly and end the sweep right on the downbeat, it's harder to pull similar tricks with Pam's.

All that said: Pam's is a great module, I sure as hell am not getting rid of mine. Just warning you about some of the areas where it falls short for me. I have mine set up with 4 clocks and 4 LFOs that I rarely change, and never change mid-performance, and it's great for that role.

At the moment, there is no intention to expand...

Buying a modular synth is like buying a boat. It's a never-ending hole in the bottom of your wallet. Good luck not expanding XD