At what quality would you be interested in a new vae for sd class models?

Current vae performance as rated by lpips scores. original sd vae: 1.2 sdxl vae: 0.9 qwen 2: 0.35 flux2: 0.24 Trouble with the last two is they do funky stuff making them completely incompatible with the early models. however, i’m working on a 32ch variant of sd/xl vae. i have it down to 0.490 likely theoretical practical limit may be 0.40 im hereby taking a poll of high level tinkerers and fine tuners to ask if you think it would be worth your time to experiment heavily with what i have already, or whether you would rather wait until i possibly hit.45.