Steam has now officially stopped supporting Windows 7, Windows 8, and Windows 8.1.::95.57 percent of surveyed Steam users are already on Windows 10 and 11, with nearly 2 percent of the remainder on Linux and 1.5 percent on Mac — so we may be talking about fewer than 1 percent of users on these older Windows builds. Older versions of MacOS will also lose support on February 15th, just a month and a half from now. Correction: It’s macOS 10.13 and 10.14 that are losing support. Not macOS period.
99 % of people didn’t “upgrade windows” back then. That would have required buying a whole new, full-price, license (or pirating). Even Service Packs were a whole deal to install. In those days you’d use your OEM Windows license the computer came with and that’d be that.
What did actually happen was OEMs selling millions of brand new shitbuckets, particularly laptops, with 1GB of RAM. That was fine on XP, but barely enough to boot Vista and if you stared any program it would swap like a motherfucker (sure, maybe it should have used less memory, but 7 wasn’t any better yet people were fine with it). Microsoft’s real mistake was allowing OEMs to sell new machines with 1 GB of RAM (IDK if it was to allow OEMs to install Vista on existing SKUs, but regardless it was the critical mistake that made everyone despise Vista).