Even though 32 GB showed a small improvement in some cases with the 2080ti, it does not make alot of sense since 8 GB was often enough for the Vega 64 in those same scenarios. I am thinking driver issues.
It would be interesting to see if quad-pumped memory would help the 2080ti. Unfortunately, you would need to use a slower CPU than the 9900k for that testing.
You will never satisfy our unquenchable thirst for benches Steve, but I think a lot more would like the focus to be on the midrange. As you have stated, the big boys are going to have 32gb anyhow, so what us the point of comparing less?
Going forward, I think there would be more use comparing 8gb, 12gb, and 16 GB systems when using mid level cards. It could help people really build the most cost efficient budget machine before hitting a ram bottleneck: an Rx580 (8gb) with 8gb system memory, a Gtx 1060 (6gb) with 12 gb of system memory or a cheaper RX480(4gb) with 16 GB of memory.
Mid-range cards were used and you can't use 12GB configurations on modern DDR4 platforms, at least not without breaking performance.