When will maschine get a midi in and out for its vst3

I wish Santa was that generous, I've been a good boy this year but considering people have been asking for this for years and years, I wouldn't your breath.

The lack of MIDI out from plugins is not related to VST3 or VST2, it's a feature for both plug versions that Maschine simply does not support, so it wouldn't be a fix, it would be a new feature. Ripcord is pretty cool BTW.

You can try the workarounds involving plugin wrappers, a few are discussed here:

Knock has a video about it: