Looks like the nRF52840 on the mesh products has the capability to measure capacitance, is there any plans to expose this feature to user space apps?
What use do you want to make of capacitance measurement? Touch button? If so, then I would use a specialised controller IC - much less problematic.
Soil moisture sampling and minimising external components. Currently we are reliant on an external component which adds cost to the BOM.