Not only in quantity, but in quality.
We had Celeste, Hollow knight, owlboy, ikaruga, into the breach, limbo, gris, guacameele 1 and 2, abzu, horizon chase, bastion, transistor, undertale, inside, yoku island express, the messenger, dead cells, towerfall, hyper light drifter, iconoclasts, monster boy, west of loathing, luminus, banner saga 3, overcooked 2, etc, etc, etc.
My question is: have been other console that received more awesome indie games in a singe year than switch 2018?