I didn’t make any claims about the long-term prospects of AI, not sure where you got that.

100,000 years — 20 times longer than recorded history — presents a ridiculous horizon to predict anything. Whatever happens on that time scale will have nothing to do with anyone now alive, or tech companies laying people off today.

Based on the current state of AI I don’t think it replaces much economically viable human activity. Over time our definition of “economically viable” will change, as it has for the last 100,000 years.