I really don’t want to jinx myself so I never say this out loud (and hopefully I won’t regret it) but I have 2 digitakts, one I’ve had for a long time. I think the production run is 2017 and my buttons are not sticky.
This is NOT TO DISCOUNT THE FACT that soft polymers do suffer from the sticky coating issue. It’s literally science.
The soft touch coating is the result of loose polymer chains and because they use these plasticizers which create loose polymer chains, the coating has a greater elasticity which makes for a softer surface, but over time the plasticizers which make the polymer chains weak and thus resulting in that soft texture start to break down and seep to the surface creating the gooey stuff you see on elektron buttons and knobs.
I have had several soft touch coated items sit in a drawer, unused, out out of light, out of heat, away from dirt, and still get sticky. It’s probably just a coincidence that my digitakt with no decksaver hasn’t encountered this issue yet. Actually, none of my elektron products have, and I will pray that tomorrow is not the day I regret talking about this.