From the press releases today, the clouds of Venus are upwards of 80% sulfuric acid, and on earth the highest concentration of acid we've observed things living in is 5%.
All of the expert testimony I heard described Venus as far to acidic for any life on Earth [0]
Looking more into it, the problem seems to be that while the absolute amount of acid isn't that high the ratio of H2SO4 to H2O is super high and there just isn't very much of either in the Venus clouds. The absolute amount matters a lot if you're just stepping outside for a bit but ratio is the only important thing for theoretical floating bacteria since they have to get their working fluid somehow.
All of the expert testimony I heard described Venus as far to acidic for any life on Earth [0]
[0]: https://www.youtube.com/watch?v=y1u-jlf_Olo