the "overused viability" needs to be updated.
https://www.smogon.com/forums/threads/generation-9-overused-viability-list.3711170/
palafin and iron bundle have been banned meaning that they don't belong in the list any more.
and some pokemon in that list see next to no play since they have next to no niche in OU.
who uses toxapex any more?ever since it lost knock off and scald it is nearly useless and completely outclassed by clodsire.
also I don't know about doubles but nobody uses klefki in singles.
and let's not forget iron jugulis, this thing is bad.
abomasnow may not be great but its access to snow warning+ aurora veil gives it some niche as a low budget alolan ninetails(it still is not as good unfortunately).