All this does is to confirm what wise consumers already knew for years anyway. NEVER purchase any AMD, etc. product at launch, unless the worst has happened and you need an replacement fast.
I'd just say: never buy anything you don't need or cannot get value from.
When I got my first 5800X just after launch, I needed a workstation much faster and bigger than anything I had. At 128GB RAM I wanted ECC and there was simply nothing else anywhere near that range from Intel or else, so I grabbed one of the very few Ryzen 5000 CPUs that were available when it launched. I really wanted the 16 core, but those were gone before I could even blink and would not return for months, even at scraper prices.
I swapped it perhaps a year later, when the 16 core prices had come down to earth and I was able to sell the 8 core at a reasonable €100 loss over a year or so.
I've never earned money on IT hardware that got more valuable after purchase, but I've made plenty of money using hardware that I bought. So I don't feel like complaining about dropping prices, but I also try to hit behind the very leading edge--if there is a choice.
For my latest upgrade, replacing a Haswell quad-core Xeon 24x7 lab server board, there just wasn't any DDR4 W680 board with ECC that could actually be bought and DDR5 ECC is again twice as expensive as DDR5--if you can get it. Both Ryzen 7000 and Raptor Lake failed in pricing and availability for a low noise server.
So finally I got a 5800X3D instead (yes, after the price drop), with 64GB DDR4-3200 ECC and an X570S mainboard, that actually lets me use my GPU, my RAID6 SmartRAID controller and my 10Gbit Ethernet NIC, which none of the current crop of Ryzen 7000 boards allow (Intel W680 would, but it's vaporware).
For €1000 total it's perhaps 80% current theoretical optimum at 50% price, but it's twice everything the Haswell offered almost 10 years ago, except noise, heat and price.
Not going for the absolutely leading edge is good advice generally, not something I see more true for AMD.
That's why the 16-core workstation got its RTX 3090 upgrade just a couple of months ago at half of what an RTX 4090 is going for now. I see it as an RTX4080 with 24GB of CUDA friendly VRAM. Perhaps that's one of the reasons why their prices seem to be going up, even if Nvidia has surplus stock.