This article postulates that the solidarity economy is not helpful, because it isn’t revolutionary:

https://regenerationmag.org/the-real-movement-against-the-solidarity-economy/

It was triggered by this article suggesting a change to Marxist theory to incorporate the solidarity economy: https://regenerationmag.org/marxism-and-the-solidarity-economy/ (only scanned this but seems a bit.. bold. Marx misunderstood his own system, ima fixit)

Smash capitalism or erode it? Not exactly a new point of ideological contention.. interesting though to see solidarity economy explicitly critiqued.