

Presumably a massive economic crash. This has obviously never happened, it doesn’t even “fall” consistently over time due to the repeated capture of new markets overseas. Marx is just describing the consequences of “automation” under capitalism, or more generally the outsourcing of human labor to machinery.
A couple things… firstly, there’s no way of actually knowing which country is going to have a revolution first or last, what that revolution would require in order for it to occur, or what outcomes would emerge from that revolution. Most everyone who’s tried to think this way has been wrong.
Also reforms are not “compromises.” Their functions are more similar to steam vents. Almost all reforms are phased out eventually or otherwise circumvented until a boiling point is reached again. There is no sliding scale. And there is no “socialist-sympathetic petty bourgeoisie and national bourgeoisie.” Virtually no one would do the things you suggest. If they do, they’re probably tricking some local anarcho-whatever collective into throw bricks at striking autoworkers because they voted for Trump or something.
What you’re suggesting is called “accelerationism” and it’s not very popular. Turning up the heat doesn’t get you any closer to revolution unless there’s a preexisting socialist framework to replace and undermine the faltering structures of capitalism. That takes actual coordination and planning. Revolutions do not self-assemble like cell membranes. This is idealism.
Just hang around a bit, this stuff will become clearer.