I just did.. after my Lumia 830 was stolen last month, I started to look for a replacement. In the mean time I went back to my former Samsung Galaxy S3. I was about to pull the trigger on a Xiaomi Mi5, but then stopped to think a bit more about what features about the Lumia 830 I really liked and would miss on the Mi5, and vice versa.
I realized that, while I really liked having access to all these apps and games again on Android, when using my Galaxy S3, the ones that I actually used regularly were also on my Lumia 830 (WhatsApp, Facebook, Instagram, a web browser). Any other apps I played with were more occasional use, during which I could just use the S3 anyway (e.g. Torque Pro).
Also, Cortana worked very well for me as a hands-free driving solution. S Voice just didn't work at all with my car.
Moreover, I really thought Continuum was a unique feature of Windows 10, so weighing those with respect to my own personal requirements were, I just picked up a 950 XL this week. I think Cortana was really the big thing that drove my decision though. I really wanted something that I knew could seamlessly work in my car.