I'll explain as if your first language is not English.
Dry means something that has no moisture in it, like sand can be dry or wet.
Obviously something dry contains no moisture or liquids.
A Martini is a cocktail, mixed from mostly gin and vermouth. In this context, dry means "little vermouth", so the taste of the gin is most prevalent.
So the joke is between the two different meanings of the word, as obviously a dry cocktail makes no sense if you take the first meaning of the word.
I'll soon be in the market for an EV, and I wish what you're saying we're true.
Other brands are more expensive, and their base price can barely compete with a tesla, but their options pricing is ridiculous.
There's LOTS of teslas where I live because it's the best bang for your buck right now as far as EV comes.
I dislike Musk as much as anyone else around here, but the companies he fronts have met lots of success, I guess because there are lots of very competent people actually running them (i.e. Gwynne Shotwell for SpaceX)