My reasons were.
I had to replace it because it is the smallest and lightest lens for my "small" Sony cameras (1 x 6300 3 x 6400 and 1 x FX30) motorised sliders and I also have a number of macro attachments for this lens.
I therefore only use it for video recordings. I was very surprised that the new one is now made entirely of plastic. However, this certainly helps with the weight.
Visually, according to test reports, it should be slightly superior to the old one.

If you want to read a very good test report: https://www.digitec.ch/de...

Conclusion: the lens is perfect for me and my requirements. However, I usually work with fast (f1.4) fixed focal lengths from Sigma and a f2.8 zoom from Tamron.