we will eventually hit some sort of limit on growth, even with “just” exponential growth—but this limit could be quite far beyond what we have achieved so far. See also this related post.
One major intuitive finding that came out of that post was that most of the adjustments I made to the speed and continuity of the takeoff seem fairly marginal—I think that if you presented any one of those trajectories in isolation you would call them exceptionally fast.
I strongly suspect that as well as disagreements about discontinuities, there are very strong disagreements about ‘post-RSI speed’ - maybe over orders of magnitude.
This is what the curves look like if s (the effective ‘power’ of RSI) is set to 0.1 - the takeoff is much slower even if RSI comes about fairly abruptly.