The "whoa 60-70% drop" argument doesn't matter when you did 600k first week IMO. If this was 10 years ago and you had a huge percentage drop sure, it might mean that you may struggle to quickly go plat unless your singles keep popping. But now? He's gonna do 130-160k in his third week, 100-120k in his fourth week, and then likely do around 60-80k for weeks. Go look at Olivia Rodrigo's weekly sales numbers and the way she's been doing 50-80k for a month straight. To me that's far more impressive than simply saying oh there was a big listener drop off so [insert talking points].
Astroworld was still in the weekly top 50 album chart a month or two ago. DAMN was in the top 50 for what, two years straight if not more? Hell you can look at the charts right now and see GKMC is at 43. Nearly ten years after it came out, it sold 12,000 albums last week. For reference, Cole's new album came out 4 months ago and is doing 15-18k a week. I get that people like dismissing streaming but this era has given has far more relevant data on the consumption of music than any other era. You can literally gauge whether an album "came and went" or not. You can gauge what is resonating, what didn't work so well, etc.