Just read through some of this again, as well as some of the other discussions and it seems that not a lot has changed... you have people that embrace technology and say "eh, that's the nature of technology today... accept it or live in a cave"(paraphrasing of course, HA) and you have those that are still paranoid and act like your life will end if you try windows 10.
So far, I still haven't done anything with it... Still torn... :/
Well, it's wise to be cautious and somewhat torn, particularly if you're coming from Windows 7 and doing so on hardware that's at the older end of the spectrum and/or you have a "well-used" system.
The biggest problem, other than carrying existing issues forward, generally relates to device drivers. While many, perhaps most, will work just fine it's entirely possible a few will not. If there are newer versions written for Windows 10 then you can install them and all will be well. If not you tend to have to go on a fishing expedition for one that will work for the specific piece of hardware in question. I have a Dell Inspiron 1720 laptop that I finally gave up on using with Windows 10 because after trying a long list of drivers for the mousepad absolutely nothing would work correctly with Windows 10. On the other extreme, the laptop I'm typing on is an HP 15-g035wm that was running Windows 8.1 that upgraded quite seamlessly to Windows 10 last fall and has generally run well since (there has been a small bump or two, but I expect this with any brand new OS).
I have had GlassWire monitoring going on for well over a month now, and it's ongoing, and I can say pretty unequivocally that if you go through the Privacy settings and configure them as you see fit and turn off Cortana and specifically excluding web results in Windows Search results that the amount of data that is being sent back to Microsoft is minimal, and my system health reporting settings are set to "full." In the month between 12/17/15 and 1/17/2016 the total outgoing traffic has been 1.8Gb, and the majority of that has been from the Google Chrome and Firefox web browsers. There is nothing in the reporting that suggests or directly shows outgoing data being delivered in any large quantity to any servers affiliated with Microsoft. This makes perfect sense if you actually read the EULA for Windows 10 and the Microsoft Services Agreement. The vast majority of information, and specifically information of a personal nature, comes from using the Microsoft Services listed in the Services Agreement. The Cortana personal assistant, in order to function, has to have access to a lot of personal data, but if you don't want to use Cortana it's a simple matter to actually decline to activate it as part of the Windows 10 upgrade.
I certainly wouldn't be in any rush to go to Windows 10 from Windows 7. I still have a Windows 7 Ultimate (32-bit) desktop computer that I have not upgraded and may never upgrade. If I do decide to upgrade that one it will probably not be until after the next major update to Windows 10 itself, and I think another is supposed to occur in late spring. The free upgrade offer remains in force through the end of July. You've got plenty of time to decide whether you want to upgrade or not.
Edited by britechguy, 17 January 2016 - 11:22 PM.