The article makes the assumption that Tesla and EcoFlow are the leaders. They're not. They're the expensive US targeted systems. For anyone wanting to learn more about other systems Will Prowse on YT [0] is an amazing resource for best of breed.
Will does a great job distilling a ton of useful information without any sort of agenda. I've purchased his books simply to support him. I'm glad to have watched him go from his early days to a lot of success just by being himself and staying honest to his reviews. Brilliant young guy.