We nowadays have a range of bathtub stoppers and plug arrangements, and in my opinion, the spring loaded "toe-tap" stopper is the worst design of the lot, quickly followed by "you've got to be kidding me - the works are in the waste shoe" linkage and spring pop-ups. With clevis and rods for basin pop-up bad design.
A well known hardware store still do a .49 cent traditional rubber plug, but few want them so it seems. For me, that simple rubber stopper/plug is still the best arrangement, with a couple kept in reserve for breakdowns and losses. The day can't be all that far off when high powered, complex, digital drainage devices are sucking unwary babies and pop stars down plug holes.