I’m running pangolin for a couple months now and instead of newt I use my router WireGuard Client in a VLAN. Any „wanted“ traffic is then routed via DNAT/firewall to my home server.

Should be doable to add that. The BLDC needs to add a proportional (or any other function) force against the rotation direction until it reaches 0.

Sounds reasonable, wonder how that would actually feel in real life? As far as I understand, this would pass through digital parts, adding a little bit of (maybe noticeable) latency, but I wonder if the latency gets high enough for it to be a bit jarring that the resistance is dynamically changing as you apply torque.

In practice, when latency is small enough (on the ~1ms level, which is trivial to achieve using even pretty cheap parts) it's imperceptible.

I sometimes develop control loops for prototype systems which use a motor to emulate a combination of spring + friction damper, and even though I know that my code only runs every 1ms, it's really remarkable how much it feels like a real continuous analogue system.

Another good example is power steering, which uses a motor to remove resistance instead of add it. If I understand it correctly, it senses you applying torque to the steering column and adds proportional amounts of boost - but because it happens so fast, it just feels like the steering is magically lighter.

This is all fairly normal in robotics, under a subset of (slightly overloaded naming sorry) “impedance control”

It’s not simply diffusion complexity. A lot of cellular transport is dependent on directed transport via the cytoskeleton and myosin. For example a 1m long neutron would need years to move proteins from one end to the other if it just relied on diffusion.