Posts like these are a good example why you shouldn't blindly trust everything you read on news sites, even if they are have a good reputation like Coindesk.
Instead of some arguments backed by data and research, the author presents some analogy between different versions of Windows and trying to extrapolate them to cryptocurrency market. He ignores the fact that Ethereum had explosive bull run in terms of ETH/BTC in this year, when ETH was close to flip Bitcoin's marketcap, but since then it was on decline, and only until recently started recovering. Bitcoin can currently process around 4 transactions per second, but Ethereum is limited to 10 transactions per second, which is not that huge comparing to traditional payment systems. Ethereum's ecosystem if filled with bugs and hacks, and their biggest achievement thus far is a relatively centralized and very primitive game called CryptoKitties. So, I really doubt that Ethereum will be a serious competitor to Bitcoin in the near future.
This.
If anything, I'd say that ETH is the DOS of cryptocurrencies, since it's more geared towards applications. Bitcoin is something different, but any comparison here won't be of much use. Also, I don't think etehereum's thriving is bad for bitcoin.
Honestly, I see two main hurdles in the cryptosystem as a whole: lack of developers and the difficulty in upgrading or updating the running software in the nodes.