there is a company called tesla that makes electric cars. they are trying to make cars that can drive themselves. elon musk, the boss of tesla, thinks that they might be able to make cars that can drive themselves by the end of next year. there is another company called waymo that also wants to make cars that can drive themselves. some people think that tesla might be able to make and sell these cars faster than waymo because they have a different way of making the cars. Read from source...

1. The title of the article is quite misleading. The word 'Promising' indicates that the trend is in favor of Tesla and Waymo, whereas in reality, the trend is in favor of Tesla and against Waymo.

2. The Ark Invest analyst's argument is based on assumptions and not on factual evidence. The statement "Waymo is slowly but surely scaling its service" is not accurate. The service is plagued by technical issues, and there is a long wait time for users.

3. The argument that Tesla can scale faster than Waymo due to its car manufacturing capabilities is not valid. Waymo's autonomous vehicles are manufactured by Alphabet's in-house manufacturing team, which is experienced in building complex systems.

4. The argument that Tesla's Model 3 is cheaper than Waymo's vehicles is misleading. Waymo's vehicles are not meant for personal use. They are autonomous taxis meant to provide a service to the public. The cost of the service should be compared to the cost of using Tesla's vehicles.

5. Elon Musk's response, "The trend is promising," is vague and does not address the specific points made by the Ark Invest analyst.