If you want a preview of an uncaring and anti-consumer Valve, look no further than the company's efforts on Mac.
Valve never updated any of its earlier games to run in 64-bit mode.... Apple dropped support for 32-bit applications in 2019
Funny enough, the only platform with a 64-bit Steam client is Mac.
I don't disagree with concerns about monopoly, but the author's key example is Macs. And from the example, it sounds to me like Apple disregards backwards compatibility (dropping 32-bit support, moving to ARM chips) and Valve isn't investing to keep up. Meanwhile, Windows has a heavy backwards-compatibility focus, and Linux isn't too bad either, so no wonder they still get Valve's attention. So who is being "anti-consumer" in this example, Valve or Apple?