There isn’t a reduced payload, in part because electric semis are given a ton or two extra weight limit and also just the heroic efforts of the Tesla engineering team. The thunderft video you linked to makes the usual bad faith assumptions for his channel (cherry-picking numbers). 11 jersey barriers (using the typical value you can Google) is about 40,000 pounds, which is a full payload.

The Megawatt charging is not a huge deal as Tesla already deploys supercharging stations with dozens of 250kW chargers (they’re started to build some with over 100 chargers, so even with shared capacity, you’d be able to charge a dozen Semis at once). With 500 miles range, you can easily hit your 13 hour daily limit with the regulation-mandated rest (while charging) at mid-day or dinner time.

Neglecting the fact that not every electric truck needs to do long-haul. The short haul market alone will be plenty big enough for a while as Tesla and others ramp up.