I had an Elektron A4K a few years ago and absolutely detested the interface (although it sounded good), sold it within a couple of months. The Super 6 is the polar opposite in terms of interface, much more my cup of tea. Hopefully yours too!
There is no user configurable oscillator drift setting right now, but it is something George has spoken about possibly adding in future. I would love to have it too. I think if there’s ever a nice editor/librarian software for it, it could really open up the synth with many deeper settings. The Q&A George did on GS last year is well worth a browse.
But don’t buy it for what it might have in future, try to get a demo and see if you dig it as is. A lot of the demos are clean sounds only, but as I said on the S6 FB group recently, the combo of analogue VCFs and VCAs, binaural super oscillator spread modulation, linear and exponential FM, audio rate LFOs, LFO rate Oscillators, a looping Envelope, and two types of distortion, can take it into messy dirty noise land very easily, whilst still sounding incredible and analogue.
I’ve never heard digital PWM, Sync and FM sound this good/analogue, something to do with the FPGA architecture I imagine.