Over the weekend, Elon Musk revealed his opinion about the gasoline-powered vehicle market in a few simple tweets. The tweets summed up the Tesla CEO’s sentiments on the topic while also giving a hint into the possible future for all automakers.

Musk tweeted about the use of internal combustion engines in vehicles today by saying, “Gas cars are so last century.”

The mocking tweet was followed up by another post that confirmed his stance on the use of gasoline engines in cars today. He said, “Passing fad. Like steam engines. They look cool in a museum.”

 

 

This isn’t the first shot that the electric-powered vehicle CEO has taken at gasoline-powered vehicles. Last month, he told Motor Trend in an interview that cars today “have no soul or no heart, and they wonder why nobody feels anything for them,”

Musk even went so far to say that by 2022, owning anything other than a Tesla would feel like “owning a horse,” according to CNBC.

Musk may be on to something as automakers shift their investments and focus to the fully-electric vehicle market. General Motors and Volkswagen pulled out of the hybrid vehicle market, saying it doesn’t make sense.

Ford has invested in electric truck maker Rivian and partnered up with Volkswagen for the development of electric vehicle technology. It also debuted its all-electric F-150 pickup truck.

Musk expects Tesla to ship between 360,000 and 400,000 vehicles by year-end, according to Bloomberg.