I'm aware of the reason. Their market share is, nonetheless, up. That's still good for Tesla, their sales remained constant while people stopped buying other EVs.

Edit: Constant is the wrong word. Resilient or consistent is what I was trying to say.

Competitors leaving the market means less competition which is a good thing for Tesla. If the market for EVs returns in the future (if, say, the next administration reimplements the incentives), Tesla will be there to reap the benefits.