Will your old PC or notebook be able to run Windows 10 when it is released on Jul 29 2015 ? I suspect most DIY users, end users will always want to get the latest update of OS as it is free if you own a license to Windows 7/8/8.1.
While some manufacturers have started sharing their list of boards that support the WINDOWS 10 OS with WQHL list. This is surely marketing as they would want you to buy new boards and upgrade to the newest processor, graphics card etc.
There comes the question, should you upgrade or not. Are you worried about the incompatibilities since your old hardware should not qualify for WQHL.
You can do a HDD or SSD clone of your existing WIndows XP or 7 or 8, run the Windows 10 Technical preview upgrade on it and see if everything works well. Since the final build will be final patches to the technical preview, I am sure the bugs should be ironed out in the final release. If your existing PC works well with Windows 7 or 8/8.1, chances are that there won’t be any driver compatibility issues with Windows 10 unless there is a drastic change in the driver for the new OS.
So, old tricks will still work just that you have a new interface to cope with.
If you are afraid of issues, then don’t upgrade and wait for the Service Pack 1 of Windows 10. Do take note you have one whole year to decide if you want to download that 3GB+ file and run it to update your OS to Windows 10.
I am currently running Windows 10 Technical preview on a ASRock H55 Pro motherboard with 8GB DDR3-1333 using the integrated graphics.
Do share with us problems you faced during the upgrade and why will you not upgrade (since it is free). Comment below.