It seems that Bill Gates and Elon Musk may have some tension brewing as the Tesla mogul took to Twitter earlier to let us know that his recent conversations with Gates have been “underwhelming.” He doesn’t really go into detail about why his talks with the Microsoft head have been so stale but Business Insider seems to think it has something to do with Gates buying an electric Porsche instead of a Tesla.

In an interview with popular tech YouTuber Marques Brownlee, Gates described his new purchase of a Porsche Taycan as a “very, very cool” vehicle. The price point for the vehicle starts at $103,800 and is the first all-electric car from the German manufacturer.

Tesletter, Tesla’s unofficial newsletter tweeted,

“I’m disappointed because a lot of people are going to watch the interview and they are going to trust Bill’s word for it and not even consider EVs. Why? Because Bill Gates is a really smart guy!”