The combo decks of old used to rely heavily on speed and so the cheapest options tended to be the best
A rules corner case comes up if the room card enters the battlefield without being cast, either because it was blinked, or the enchantment returned from the graveyard
This style of deck tends to lack a way to close the game outside of a combo, so swinging with your value-buffed commander is a breath of fresh air
Thantis, the Warweaver is somewhat interesting as a Jund Spiders commander, although as a creature, it's mostly just a big creature that is likely to get you killed if you're not prepared by forcing opponents to attack
I guess all Aetherborn eventually fade away, and so it was only natural wed get something riffing on Gonti eventually
Decks that are smaller than yours are exactly what you dont want to be playing against