I really hope that those who participated in the site recognize how much fire they were playing with, and stop doing it before Wizards legal is the one reaching out
That said, the card is not overly popular or making a big impact on the Modern metagame
As a commander, he's a popular option for planeswalker theme decks alongside Atraxa, Praetors' VoiceAtraxa, Praetors' Voice, Esika, God of the TreeEsika, God of the Tree, and Commodore GuffCommodore Guff
At this point, nothing can be done until the effect fully resolves
If multiple creatures enter at the same time, evolve may trigger multiple times, although the stat comparison will take place each time one of those abilities tries to resolve
Interactions such as Ancient Greenwarden and Emancipation Angel make me excited to see which themes Wizards will expand upon once we reach Kaldheim and beyond in the new year