"which apparently hasn't been updated since 2006"
Incorrect if its Windows supplied. The date remains the same but the version does get increased. They have reasons for doing it that way.
I agree though that there's an issue with suspend of monitor/system with default settings.
But, seen this with Linux too as well as worse there so its not just Windows lol. You need to look past that. Its a problem of the over complexity of computers today and not enough testing.
Regardless, its possible to overcome the issue through either changes with power/drivers in the OS or the BIOS power settings. I've never once seen it not possible to overcome any monitor/system suspend issue even if its more aggressive for a time. If you think its not possible then you're incorrect.
That said, your viewpoint and words don't reflect well for wanting to have help and there are solutions that you won't do. If it were my own computer I would because I have.
Actually, I will add, the monitor suspension is heavily involved with the GPU driver and hardware. Its difficult to say if that's interacting badly here, if there's a sleep state issue. or something else going on since there's not enough correct info supplied.