

They said they would wait until there was a meaningful increase in the power or efficiency they could get out of the form-factor.
The OG deck launched 3.5 years ago, and since then not much has changed. The steam deck GPU has 1.6 TFlop of FP32 compute at 15W. AMD’s newest low-power APUs have 2.3 TFlop of FP32 at 28W - nearly double the power for a <50% theoretical performance gain.
A semi-custom APU (that removes the useless AI engine) would compare more favorably, but we are still talking about maybe 20% more performance, not exactly game changing for the cost.
Nvidia historically didn’t invest in Linux drivers.
Things have gotten a bit better, but there are still plenty of issues with Wayland compatibility specifically.
Install the proprietary driver and it will work, but under Wayland you may have issues with resuming from sleep, stacked transparency, fractional resolution scaling, and HDR compatibility.