Just swapped the GTX 1070 in my 22-core Broadwell Xeon against a GTX 1080ti that got returned to the pool yesterday: booth are doing a quite reasonable job running games at 4k, although not at 'ultra', running Windows 11 IoT with support until 2034, as well as all kinds of Linux.
Because it looks like Windows 12 won't be supporting either.
I see that as the real issue: M$ may decide to change something significant in the driver architecture to close the performance gap to Linux/SteamOS and those changes won't be backported to these hardware generations, while Windows 10 drivers work with its 11 refresh.
The main appeal of the Broadwell and the GTX 1080ti is their broad hardware and software support, so many slots and ports to plug things into for experimentation and 128GB of RAM to virtualize everything while the energy consumption is actually quite modest and pretty much on par with a Ryzen 7 5800X that offers near identical multi-core performance.
As bad as this is, AMD is much worse: they have deprecated support for hardware that was still being sold as new at the time (e.g. Richland APUs). And they are the only x86 PC vendor I know that skimps on Windows Server signatures on their drivers: Intel has done that, too, but only on some SmartNICs not CPUs, GPUs, or mainboards.