Also non-geologist, but my understanding is that the gassing is a sign of "frothing", active magma. It's the difference between boiling just water in a saucepan, and boiling water and pasta - the latter will result in the saucepan overflowing.

I believe that the switch in out-gassing behaviour suggests that the magma viscosity and gas levels have hit a critical point that means that the field is more likely to erupt.

I really don’t think it matters. Once society is derailed in a way that all food supply chains are disrupted, unless you like in a house on a forest mountain, you’re not going to survive. It would be full on carnage.

how far in are we in those thousands of years?