  Currently, flavour-cryptoexotic tetraquarks form the most common sort of all
experimentally established exotic multiquark hadrons. This note points out a
few promising concepts that should help improve theoretical (but, for several
reasons, not quite straightforward) analyses of such kind of states: among
others, their scope of application encompasses the strong interactions in the
limit of (arbitrarily) large numbers of colours, and equally analytical and
nonperturbative approaches to multiquark states.
