Once we have mega chargers, solar panels etc
Who is saying that? There are already 250 kilowatt super chargers out there now.
https://cleantechnica.com/2019/07/01/teslas-nanochargers-del...
I'm just sceptical (skeptical) because I've worked at companies where out next product will beat our competitors previous generation
What does that have to do with anything? You think diesel trucks are going to leapfrog electric trucks in efficiency by the time electric semis make it to market?
Because the electric truck has an undefined cost, because it doesn't exist, and can't ship any goods.
It affects opex like crazy. Tesla service has been problematic since the very beginning. Parts are highly available for diesels. Being able to have a diesel guy outside your house means you don’t have to worry about Teslas customer service disappearing you for a few weeks or months at a time.
Another big part of the win is maintenance costs which are also noticeably lower.