Tesla's cars are starting to look pretty basic — and that's a problem

• It's been years since Tesla meaningfully changed the appearance of many of its cars.
• The aging vehicles have a negative impact on consumer interest, experts say.
• Investors called for more information on Tesla's new products during the earnings call Tuesday.

Tesla has a problem. Its cars are getting stale.

Sure, there's the Cybertruck — if you want a large truck and ordered early enough to actually get one.

But people looking for a flashy new design in Tesla's more traditional car lineup are stuck waiting for now.