I've upgraded (sidegraded?) to a Brewzilla 65L and no longer use the Grainfather.
It's the Bluetooth model and it's been upgraded to quick disconnect fittings for the included counterflow chiller. It also includes the Graincoat (insulation).
I've brewed ~45 batches with this system with no...
In this exbeeriment, they were unable to tell the difference between beer made from grains milled 6 months prior and beer made from fresh milled grains.
https://brulosophy.com/2018/10/29/the-impact-of-age-on-crushed-malt-exbeeriment-results/