Honestly, given the constant rollercoaster of version management and building tools for Python the move to something else would be expected rather than surprising.
I’ve seems like a great tool, but I remember thinking the same about piping, too.
uv is a revolution in every possible positive sense of the word in the Python world and I've been here since 1.5. it is imperative that bitter oldtimers like us try it, I did and the only regret I've got is that I didn't do it sooner.
I also tried it and am now using it for new projects. But I was just fine with Poetry too. Yes, uv is faster and probably better code. But my use-cases didn't necessitate to re-create the venvs frequently, so the slowness of Poetry didn't matter that much to me, and I am not using the "one-off script" kind of approaches that uv enables (writing the dependencies in a comment in the script itself).
So, yeah, uv is nice, but for me didn't fundamentally change that much.
I’ve seems like a great tool, but I remember thinking the same about piping, too.