I think one of the keys is that they have to be able to be constructed relatively cheaply and with off-the-shelf components. If it costs $5000 and you need an engineering degree to build the final product it isn’t really a leveler, more of a toy for wealthy land owners.
I’m also interested to see how these hold up in the long run. I have a 2017 BMW ev and really the only maintenance has been tires and a cabin air filter. One of the main reasons I have avoided buying cars like a Porsche ICE vehicle is that, once you have purchased it, there are large, ongoing maintenance costs and it feels like I’m signing up for a subscription service for my vehicle. If these are fast, cheaper, and also have low ongoing costs I might be in. I’m also mildly concerned about all of the telemetry they gather. I would really rather have a dumb car that I can hook to my smart phone and display Open Street Map or something on it. Then I get to make my software choices to a greater extent.