Rivian CEO RJ Scaringe says the money automakers charge for self-driving software won’t last, comparing autonomy to airbags: a paid option today, baked into the price of every car tomorrow.

The comments, made in a new interview with WIRED, amount to a quiet warning shot at Tesla, which just moved its “Full Self-Driving” package to a subscription-only model at $99 per month.

Rivian laid off hundreds of workers on Tuesday, or less than 2% of its workforce, just one week after it began deliveries of its all-important R2 SUV.

The electric automaker confirmed the cuts hit its service and customer teams, which include sales and marketing, as it tries to claw its way to a profit it has yet to ever post.