The case is solved. Elon Musk recently revealed that SoftBank, owned by Masayoshi Son, had defaulted on power equipment in the AI data center sector. He later added that he and SoftBank had a history of conflict. Back in 2018, Musk wanted to take Tesla private and delist it. He approached SoftBank's Masayoshi Son, hoping SoftBank would offer approximately $12 billion for about a quarter of Tesla's shares. However, Son didn't invest in Tesla. Instead, he believed in the shared office space market and poured money into WeWork. As we all know, WeWork's business model collapsed. Its valuation plummeted from tens of billions to almost nothing, resulting in significant losses for SoftBank. Meanwhile, Tesla's stock price soared, and SoftBank missed a historic opportunity. This is why Musk recently called Son incredibly stupid and lacking in judgment.