I think it’s highly improbable that the Analog Four could get an update that gave it the digital oscillator sound of the Ensoniq synths, although the above are all potential workarounds.
The closest modern-day equivalent of the wavetable synth + analogue filter formula in a small format might be the Mutable Instruments Shruthi-1 (monophonic) or Ambika (polyphonic) synths or the equivalent Mutable Instruments Eurorack modules.