From a Wall Street Journal story by Tim Higgins and Deepa Seetharaman headlined “Musk-Zuckerberg Feud Sinks to Steel-Cage Level”:

Even by the standards of billionaire-versus-billionaire tiffs, the proposed cage fight between Elon Musk and Mark Zuckerberg stands out.

The two have tentatively agreed, through posts Wednesday on their respective social-media sites, to the duel after years of quiet tensions that have grown more intense with Musk’s acquisition of Twitter late last year.

Since then, Zuckerberg has seen an opening to attack rival Twitter, which has been beset by drama and missteps under its new owner. The latest shot: having his Meta META -0.59%decrease; red down pointing triangle Platforms prepare its own tweet-like offering through Instagram.