My subscription is running out in a few months. I never started using EN because I want separate large collections of data (flight plans in Flight Simulator notebook for example, which belongs to Games stack which belongs to Personal stack). I will definitely extend the subscription when this feature is available. The team is doing great job otherwise and I love your CEO.
Stack levels doesn't need to be infinite. 3 levels would be enough for most of ppl. 2 levels would be fine for me. 1 level is a no-go.