Editorial does not give one license to print lies. But there is more to a lie than being factually incorrect. It requires willful intent to deceive. Do you think that is the case here?
Um close, but not quite. First, a newspaper can intentionally lie about anything it wants, only at the risk of losing credibility with its readership. What is a "lie" will vary with the newspaper, or, more accurately, the social media platform and
the readership of that platform. Everyone is familiar with the recent issues in the US about what were called lies, others saying were a criminal offense, no need to go into all of that.
The one-liner, strictly in the legal sense, cannot be a "lie" or "factually incorrect" as it is commentary. It is by definition "commentary" because it is designated as an "Opinion" and an "Editorial." The most protected of all 1st Amend. Speech in the US. That's the first step.
Then you move on to for a lie or factually incorrect statement to be
actionable, it has to harm someone (a corporation is treated the same as a person in the US). If the person/company who alleges they are harmed by a statement in a newspaper (print or online), they have to prove that the statement was: 1. false (truth is an absolute defense); and 2. made with malice, which is "knowing falsity or reckless disregard for the truth."
But let's assume that the statement in the Guardian did in fact harm someone, and they can prove the harm (they lost sales for example, like maybe the statement was about voting machines and the person harmed is a voting machine company maker for example). Again, from a legal perspective, you couldn't even prove that the statement: "the sound of digital music, as every vinyl fan knows, is not, and never will be, half so rich and warm as the sound of an LP, and playing it does not tend to encourage, as spinning a record does, truly serious listening" to be either a lie, or factually incorrect, at least in the US.. The statement is subjective. How can you possibly prove that statement to be false? It's equivalent to a music/movie/opera/Broadway Theater/book reviewer saying what they heard and or saw "was the worst possible thing ever produced in the history of (fill in the blank)." Or even the best [fill in the blank] and you went out and spent money on it and you want to bring an action against the reviewer for the waste of time and/or money wasted on the movie, play, opera, record, or even a piece of audio equipment. Depending on the reviewer and location, a review can actually have a serious financial impact (millions in the case of Broadway musicals and plays). Some past cases have revealed that a reviewer went the extra mile of panning a piece because of spite or some animous towards the artist/producer. Result, "sorry, it's fair comment that is essential to a free and democratic society - regardless of how much of the pan was a result of the reviewer personally hating you."
The courts in US have repeatedly, held, (especially the Federal courts), a statement such as that in the Guardian isn't a statement of fact, and any reasonable person (the courts would say) would know that isn't a statement of fact. The case would be dismissed. In the UK, the case would also be dismissed, under similar interpretations and the attorneys' fees rule in the UK is that the loser pays all the other side's attorneys' fees and costs.
It's not even a close case (from a legal standpoint which is the question you asked).