In general is a good article, even that is repeating over and over same things in each chapter.

What I notice is that is written by somebody that still lives in the "fiat mentality"...

>The amount of Bitcoin required to open a channel will depend on the specific implementation of the Lightning Network, but it is typically in the range of a few hundred to a few thousand dollars.

In LN there's no such thing as "dollars", ONLY SATS.
Considering "volatility" in LN shows that the writer of this article is still a fiat maxi abd runs LN nodes only for profits in so called dollars shitcoins.