yeah, I recently bought an ES-8 , so was keen to try it...
it does a very good job , nicely accommodates the drift that occurs, and so you get a nice range with all notes in tuned with +/- a few cents.
the results of the calibration are quite interesting, as they show the tuning curve

so Plaits in Eurorack (simple waveform) is completely flat , as expected

the AE OSC2 is pretty flat initially, but then you can see the tuning rises.

this AE VCO again pretty flat initially, then drops.
however, another VCO I have, actually is flat then rises
I think what we are seeing in both cases is its flat in the octave range we tune them for, but outside of this they then move a bit.
but Ableton/ES-8 can nicely compensate for this.
this is basically what I was doing with the ArdCode scaling project i did... but I found it a bit of a pain to do each time, as it didnt have the auto calibrate mode found in ableton.
technical notes:
- the AE oscillators Ive calibrated to as good as i can get... i think

, and I waited for them to stabilise
- I haven't yet run for a long time to see how long they are stable at the given calibration, or if they frequently drift.
- I didn't test, but my assumption is Bitwig will be the same - similarly I guess silent way will do the same thing (but I don't have to test)