Earlier quoted context omitted.
No, it’s not. It means you don’t pay capital gains when you’re merely exchanging one form of crypto for another. You have not realized any gains until you have converted your crypto into real assets. Converting from one form of crypto to another for the purposes of arbitrage only delays the taxes. It never eliminates them. This is really no different than selling and buying stocks in an IRA account.
Crypto-crypto trades no longer enjoy the like-kind exchange tax treatment you're describing (in the US, as of 12/31/2017). The recent tax law narrowed that benefit to real estate only. https://www.coindesk.com/owe-irs-crypto-crypto-trades/
On 31 December 2017, the IRS clarified that § 1031 does not apply to crypt-crypto trades. It did not say § 1031 applied to crypto-crypto trades before then.
The article you reference says "traders still may be able to argue that their transactions undertaken in 2017 and prior years were not taxable under the Section 1031 like-kind exchange rules," but that "the application of the like-kind exchange rules to crypto transactions is far from certain" [1, emphasis mine].