I know this might come across as a rub in the nose of some, but I really don't mean it that way.
I'm late to the preview world. I only loaded my first preview a couple of weeks ago. The current build on a Lumia 1520.
I was so concerned with the possible trouble it might cause, that I went to Walmart and grabbed a 640 so I would have a 8.1 "daily driver".
I rarely have touched the 640. Mostly just to compare 8.1 to 10.
My 1520 has been absolutely fantastic to use with this preview.
Solid too. No locking or freezing or crashing. At least nothing to even require a soft reset.
Don't get me wrong, I see and experience many of the "bugs" of the preview, but nothing that causes me to use the 640 instead. I admit to only using the phone the same exact way I used it on 8.1.....
I take pictures often. They upload to OneDrive properly. (although there is a noticeable delay)
I open my corporate Exchange email continuously. I rather like the look and feel of it.
I LOVE the new Office Apps that let me print to discovered printers on the network. Absolutely awesome feature. And the formatting the app does on Excel is very very nice for printing.
Yea, I play a bit in FaceBook. No more or less than I did on 8.1
I also LOVE how Edge renders the Gmail account. At first I was disappointed I couldn't configure the native email app for Gmail, but holy cow that Gmail is gorgeous and fast and elegant in Edge. I think I actually prefer it that way.
I'll stop listing what I am finding awesome.....I have made my point.
So I'm really just curious, what is the reason one L1520 would behave well, relatively, and another L1520 puke on it?
I don't have any reason to doubt that all I read here amongst the various previewers is accurate and true. It just seems strange that in the world of 1's and 0's that the identical outcomes are so UN-identical.
Still, I'm ready for the next build. I too am looking forward to non longer needing the backup-640 for hotspot!