I dunno. Theres some experimentation with 2.1, but the consensus seems to be that it produces inferior output to 1.5 outside of some niches, and thats before taking the 768x768 1.5 finetunes into account.
Deepfloyd is niche.
SDXL is indeed interesting, especially if its happy with 4/8 bit quant... we will see about that.
Nevertheless StabilityAI seems kinda disconnected from all the innovations going on in the community compared to, say, huggingface.