I think the two years since War of the Spark have made people forget what spell-based sets that shake things up look like
This treatment increases the value of a card as well, sometimes drastically with cards like Atraxa, Praetors' Voice seeing a nearly $80 spike with the treatment, but others not so much
And if they were, would they be true planeswalker cardsor do the candles going out represent those planeswalkers losing their sparks, leading to legendary creatures cards of the characters
Example: A Clone enters the battlefield as a copy of Chittering Host (the combined back face of a meld pair)
(There are heaps of those available.) It doesnt have all the different variations, such as borderless variants and art cards
By stacking three or four differently named copies, you can bypass the legend rule and keep all of them on the battlefield at once in Brawl