If self-adhesive resin cements are easier and faster to place and have less postoperative sensitivity, can I get rid of other resin cements?

No, there are still some circumstances when total-etch resin cements are favored over self-adhesive resin cements. In preparations where there is little retention form, a total-etch resin cement, used with a separate etch, bonding agent and primer, will result in a better bond.