He’s incorrect. You do NOT need room treatments if you set your system properly. And no. Hes wrong on giant killers. There are MANY out there. Lets start with the Audiopax Model 88 which when released was priced at under 10k. Yes you read that right. Under 10k!!!.
Darko nailed it. 12 examples of wishful thinking in the hi-fi community
John is on his game with this opinion piece. All 12 points are valid.
https://darko.audio/2025/06/12-examples-of-wishful-thinking-in-the-hi-fi-community/