An OS is not dead ... ever.
It depends on what you use it for, and how well you've analyzed your requirements and the risks associated with it.
Some US government agencies still use XP. And, they pay Microsoft for continued support - simply because it's too expensive for them to switch from those old XP systems.
Large companies are similar, staying with W7 because of the upgrade cost.
Just because an OS is free, doesn't mean that the upgrade is free to the owner.
What about hardware that won't work with the newer OS? What about compatibility of proprietary software that they may use?
Again, they've done a cost/risk analysis and have decided to stay with the older technology.
My wife's company still uses W8 (updated to 8.1). She used W95 and XP for many years until the proprietary software that she uses was updated - then we seized the opportunity to update the OS's.
We don't wish to pay the owners of the proprietary software that she uses to ensure that an update to W10 goes without problems.
So we stick with W8 even though it would be free to update to W10.
She also has some other proprietary equipment and some older equipment that may not be compatible. But since we've decided not to upgrade, the decision on those devices/programs can wait.
I had an older friend who used W98 years ago (around 2005/6).
He visited 3 websites a day and checked his email on the web.
He put no personal info into the computer and only corresponded with his grandchildren.
His daughter insisted that he update to Windows XP because it was "better".
I updated him to W98SE and tweaked some settings so that it would work better for him.
He used that system happily until he passed away a couple of years later.
Edited by usasma, 10 July 2016 - 06:02 AM.