A man named Gary Black thinks a company called Rivian makes electric delivery vans for Amazon. But, Amazon can only take so many of these vans at once because they are busy during the holidays. So, Rivian is making more vans than Amazon can take right now, and that's why there's a gap between how many vans Rivian makes and how many it delivers to Amazon. Read from source...

- The title is misleading and sensationalized. It suggests a causal relationship between Rivian's lower deliveries and Amazon's van production capacity, without providing any evidence or data to support this claim. A more accurate title would be "Rivian's Lower Deliveries May Be Related To Amazon's Van Production Capacity".
- The article relies heavily on tweets from Gary Black, who is not a Rivian or Amazon insider, but rather an investor and former executive. His opinions are not necessarily representative of the companies involved, nor do they reflect the actual facts on the ground. A more balanced approach would be to include quotes or statements from official sources, such as Rivian or Amazon executives, analysts, or experts in the field.
- The article does not provide any context or background information about the rivalry between Tesla and Rivian, nor does it explain how this affects the demand for electric delivery vans. A more comprehensive analysis would include a discussion of the market trends, customer preferences, competitive advantages, and challenges faced by both companies in the electric vehicle sector.

Possible recommendation 1: Invest in Amazon (AMZN) stock, as they are a major customer for Rivian's delivery vans and have the potential to dominate the electric vehicle market with their own EV ambitions. However, be aware of the risks associated with relying on one supplier (Rivian) and the possible impact of the holiday season on Amazon's demand for vans. Additionally, consider the competition from other EV manufacturers such as Tesla and Rivian themselves, who may also offer attractive products and services in the future.