

In my opinion, that’s not on Steam to support their client on a long past EOL operating system.
It is on them since they “sold” you a game. They didn’t have to build a business model that popularized always checking in DRM, that meant that they were deceiving you when they sold you a game, but it was more profitable for them to do so.
No, they didn’t. I can install the software I bought back in the day on the computers I bought it for, using the license key provided. GoG also famously uses a model where GoG does not care what OS you’re using.
Lol, I’m a software developer that started by writing legacy windows software, I know exactly how much (little) has changed.
I don’t care. They have the resources to support it.
Either strip the DRM out and pay whatever you have to to the publishers to do that, or keep supporting the systems you sold your software for.
The idea that Valve is blameless for shitty behaviour because other tech companies also do that shitty behaviour is nonsense. They have been the dominant platform forever, and have had an insane amount of resources available to them.