I worked at a startup that considered liquid lenses from a French outfit for optical applications back in the early 2010s. Problems with the technology include

I worked at a startup that considered liquid lenses from a French outfit for optical applications back in the early 2010s. Problems with the technology include reliability (not great having fluid near electrical components), repeatability, and focus time. It's also hard to expect that the lens can easily 'snap' to focus, since there will be some play in the polymer / motor drivetrain. Mammalian eyes require a complex biological support system to keep them functional over years and decades. An unfortunate aspect of polymers (like the skin of this lens) is that they do not maintain flexibility in the long term. Perhaps there's been a leap in the technology, but I'd avoid the first generation if possible, like I do with all newly implemented tech, since I consider the camera a critical function of my smartphone.