The way I see it, Abstraction is reversible because deleted data still exist within the software. Their body run on Caine's program, which meets an error without the removed brain scan, resulting in abstraction. But the data is still inside the abstracted body, meaning it could be restored.
Abstraction isn’t necessarily a 1:1 allegory for death by suicide so much as it’s like losing oneself in any kind of mental health spiral, including addiction. How everyone visits Jax and the other abstractions also reminds me of visiting a loved one in long-term care or inpatient treatment.