"Although IC technology is mature, there are still situations where discrete design beats ICs—typical advantages of discrete amplifiers are potentially high supply voltages, high maximum dissipation, much extended options with respect to choice of passive components and the possibility to tweak even the last bit of the amplifier for the task at hand. Here you’ll find several schematics and links about this topic."
I.E. greater tweakability / scope for customisation of a circuit to suit the exact purpose/outcome/spec which makes discrete solution potentially a better choice in certain situations. For example, my 80s vintage Onkyo amp has a kickass phono stage based on a discrete design - no ICs at all.