However, it also essentially stops any business from accepting zero confirmation transactions for small values, since all transactions (even those opted out of RBF) could potentially be replaced using RBF.
I didn't see much talk about RBF outside bitcointalk forum, maybe because everyone is talking about crash and bear market now 
I think there is a good chance that companies and regular members will rather accept Lightning payments for smaller values instead of using Bitcoin on main chain.
Fees are smaller this way especially during the time when there is congestion in mempool like we saw recently.