Creature wise I've won with Guiltfeeder multiple times (going under the bridge) and Necrogoyf has helped out more than once take some life totals down
And casual fans who do not collect anything else, who may not even know the difference between a holo and a non-holo, will still drop serious money on a single Charizard card for their shelf, their display case, or their memory box
even with so, so many builds out there with thousands and thousands of people building the same commanders, theres always room for a little spice
In an Eternal format like Commander, players have access to so many cards that you can take an otherwise basic mechanic (like gaining life) and turn it into so much more
A Last Gasp, a Negate, a Boomerange and the ability to kill a planeswalker
If Yu-Gi-Oh