Your Source is a blogger that has in our and when we understand him correct also in his own view no fundamental knowledge of blockchain industry. "It's definitely not my cup of tea, but who knows, I might be wrong on this one. It wouldn't be the first thing that I'm wrong about, that's certain. I'm a serial entrepreneur, blogger and ultrarunner. You can find me mainly on my blog at Dragos Roua where I write about productivity, business, relationships and running."

His claims are partially wrong or not very accurate (for example when it comes to proof of stake). But nevertheless he points to important topics. Here are some words on those topics:

1) A copy&paste from Telegram: "The thing is, our MMUs can accommodate a wide variety of hardware configs: asic, gpu, mix; and choose the coin, algo, etc dynamically based on config and current market conditions.  So if any protocol is overwhelmed, they switch to something more profitable in real-time. We've also got a killer team of blockchain experts that are in the trenches with the devs from the big protocols. Ethereum is on the other side of town, you know. We are ready to meet any changes on both the hardware and software side." Information might be a few days old but Ethereum things of bringing 1% proof of stake. That has no relevant influence on mining rewards. Maybe in case that system works (and as there are thoughts to just bring 1% as a test it does not look certain yet) there might be bigger amounts of proof of stake but still there is a billions of money invested into ICOs the last two years and a lot of companies working on Software that should work based on Ethereum. In case all this interesting projects the community trusts in come to live there will be need of infrastructure. It is not very likely that this infrastructure will be 100% proof of stake. Maybe someday the mining profit for ETH goes down but that is where envion profits from as envion market share should rise as soon as profits go down as envion has best position due to aways lowest possible energy costs, extremely low cooling costs and the low overhead due to simple and cost efficient container infrastructure. After Ethereum there are a lot of other projects that need infrastructure right up to private blockchains.
2) We will not pick what is left, we are in competition with those existing mining companies not being behind but ahead with a mobile mining infrastructure that could settle for example next to existing operations in Iceland and easily move to Norway in case the price in Iceland rises which could happen. Doing mining in Iceland for example as competitors do is a tradeoff. Price is not cheap but around double the price you could get at other places around the world. But as a stationary company you have to do a tradeoff between electricity price and a forecast for the region. And also this forecast in Iceland is not 100% safe as for example Stefán Gislason, environmental advisor and lawyer in Iceland once explained that nobody knows for how long geothermal energy will be still available. Envion could is a lot more flexible here and could go more for the electricity price when it comes to the decision where to do the mining.