The fundamental misunderstanding here is that a nearly steady-state economy is not a situation like the 1970's. It's a situation where 90% of the population is unemployed and unnecessary. Our expectations for a steady-state economy should be adjusted to mean the situation that existed from the fall of the Western Roman Empire to 1850 or so.

Vast majority of people on unemployment, barely subsisting. People who have viable businesses dig in and isolate themselves (if necessary declaring independence). Ever-growing consolidation of power and every institution falling to the influence of ever fewer power centers.

Fortunately, a mere 10 years of steady state economy won't get us to that point. Today we're already at the point that something like 60-70% of the world's population is useless (if you killed all of them tonight, tomorrow there would be no visible difference at all). That number is increasing fast.

The cure ? Remove the scarcity of electricity might do it. Find something to do (the way some medieval economies solved it was to employ 70% or so of the population for building cathedrals - manually. Every last thing manually cut from stone. That could work). War is another option, used in the middle east did (well, one particular group, really). As long as they keep winning, their borders expand, their economy grows, and it can last quite a while in that state.