Hope

Nothingness is an a priori assumption. Nothingness can only be part of analysis if consciousness and being are assumed separable from existence. Like the Copenhagen Interpretation isolating the classical from reality / quantum. It’s separable only by assumption. Experience painted so stems from experiences or choices (literary, personal or critical). In that, Sartre is overcome.

EXCAVATION
Being and Nothingness, Jean-Paul Sartre, Hazel E. Barnes translation
Sean Carroll, The Many Hidden Worlds of Quantum Mechanics , Chapters 1 and 2.