I think he is still correct in saying that the gear OP bought is worth much less now and further deteriorating fast. See my comment above here https://news.ycombinator.com/item?id=46227813.
GPUs have such a short liefspan these days that it is really important to compare new vs. used.
Is it? The used data center P40s I bought for $150 2 years ago went back up to $450 a few months ago, I sold one for $400. I just checked and price is down to $200, so I'm still profitable. I bought MI50s for $90 less than a year ago, they are now going for $200. What deterioration? OPs gear was far less and is no longer deprecating. It will probably hold this value for the next 4 years.
This is hard to say for sure.
I had 4x 4090, that I had bought for about $2200 each in early 2023. I sold 3 of them to help pay for the GH200, and got 2K each.