I did a bit of research and reading into Envion, but remain quite skeptical.
Not to say it is a scam, or will fail or anything......but it just doesn't give me the warm fuzzy feeling that they really know what they're doing......or at least have everything thought out properly and planned.
They also seemed very hesitant to provide full transparency to potential investors....at least that's the feeling I got.

1. Not possible to view an actual fully functional MMU at their facility. At first they said welcome to anyone, but later said they do not want to discourage potential investors by showing a non-functioning unit, and also they are not able to provide trend data for extended durations on the actual performance of the MMU.
2. No information on how they intend to get agreement from individual power plants to install their MMU base on their sites. No pre-agreed collaborations.
3. No transparency on what type of hardware they are using, and how they intend to obtain them in large enough quantities in order to start immediate production, despite the global shortage of graphics cards. Judging by the current state of global supply, it could take a long time for cards deliveries, which means potential delays in deployment of the MMUs, and consequently a delay to the project in general.
4. No information on the scalability of their hardware. Will the MMUs be obsolete before they are even deployed?

These are just a few questions off the top of my head at the moment.
From some forums, there seem to be some misinformation or misunderstanding on the background of their development team, and also many potential investors are not satisfied that their founders are thickly veiled in secrecy.
This is in very stark contrast with many other projects like TenX, Verge, NEO, ETH, QASH, etc......where the whole team and founders are very transparent.

Not saying it is doomed to fail (for all we know, it might be the next big thing and go 100x) but it just doesn't give me a good feeling.