Reactive armor is one charge, and only covers ~30 - 40% of the non-inert [no air or wall behind the ERA] portions of the turret.
It’s why I personally rate ERA lower than composite armor protection. Not by much case in 1v1 that ERA can protect them from death long enough to stay alive.
So yeah, BVM is good, it’s just not top 5, and likely not top 10 anymore.