Dappnode's Smoothing Pool, "Smooth", has bumped to 1500+ validators smoothing their execution rewards.
A new breakdown of the numbers of the pool since its launch in November 2023 reveals that participants in the pool are expected to earn 120% more execution rewards by participating in the smoothing pool vs. the median validator.
Pol Lanski did a talk at EthDenver answering the question: "Does it make sense to join Smooth for a solo staker?" the answer being a resounding YES.