How do you mean, exactly, not usable?
With what plugins?
I’m running here with UAD, Waves, Voxengo, Nomads, Sonnox, Softube etc and have no trouble at all…
Yes please, be more specific about it.
With very much the same Plugs, with the addition of Brainworx, Virsyn, Spectrasonics, LAWO, Melodyne, SPL…,
I have not noticed any problems, yet.
But it is surely good to look into this, what could bother more users, too.