what exactly is it you want, smooth stepping is an oxymoron afterall
it’s possible to get ‘smooth’ lfo output on all Elektrons, but without stating the obvious, some destination parameters are Not smooth, i.e. like that referenced in SOS review where the review predates the addition of menu which allowed the targeting of operator pitch in a secondary way that was other than the intended discrete steps hard wired into the device. That was the way it was expected to be on that parameter. The operator ‘offsets’ allow a ‘smooth’ control over the operator frequency and this is giving very different atonal results than teh original arrangement had intended.
Anyway we digress, there’s no difficulty whatsoever in achieving a smooth filter rise across a very long period if you know how to use the LFO and understand all the other parameters which may affect the LFO, like e.g. note retriggering etc and whether this retriggers the LFO
First start with a long sustaining single note, master the long LFO rise technique discussed elsewhere on the forum for every unit, they all have similar LFO designs (post OT)
What the Elektrons don’t have is a way to smooth existing shapes, they are a fixed (but varied) selection and broader than most. Smooth randomisation is the only significant one missing imho - which would get closest to the notion of smooth stepping