>But I doubt the paths in the brain will ever go away. It will be like a overgrown path in the end but it is still there.

While this aligns with current knowledge of neuroscience, provided the 'healthy' paths overgrow the stress-pathways over time (maybe using methods described in CBT or MBSR for example), theoretically the latter ones should become a non-issue over time. Picture a road being built over a footpath. Notwithstanding building that road requires a lot of conscious effort. But it seems doable, both based on scientific data and anecdotal evidence in myself and people around me.