I have a RTX2060 FE and an A4 SFX. The computer is on top of my desk.
No idle stop. Little to no chance it can be modded in, since all of the AIB RTX2060s I have found are custom PCBs, so there is not likely to be a compatible vBIOS that can be flashed over (with the idle stop feature).
It's noisier in all situations vs the GTX 780Ti blower it replaced (at idle and at load). If I remove the side panel, the noise drops considerably, though it's still noticeable.
The fan design seems to create a lot more turbulence than necessary, especially given the small airflow. If I lift the side panel a cm from the side, the noise is still present, at nearly the same volume. An ~1cm gap is what a stock Noctua NH L9i (or L9a) has in this case, and its fan is much quieter at full tilt.
I've never bought two GPUs in successive generations (I've always skipped a generation, or a few, in the case of the GTX780Ti), but I am strongly considering it this time around. I bought the FE because it had the VirtualLink port and it was at MSRP during launch.
I'm also considering going back to a blower. It should be noted many blower designs still dump a lot of heat back into the case (my reference GTX780Ti had a number of vents near the SLI connectors, and I see this to be the case for almost all other blower designs, too). Of course, the RTX 2060 FE dumps all of its heat back into the case, and after a few minutes, the fan closest to the power connector is just sucking hot air. I eventually installed a fan where the HDD cage used to be, which helped a tiny bit.