Playing around with #Modyfi, that does support #VariableFonts now. This shrink-wrap modifier seems destined to be used with #ElectricBlue.
#Animating variable fonts has never been so easy!

https://app.modyfi.com
(I’m not payed to say that, Daniël tipped me off and they reached out to hime for some collaboration #fulldisclosure)