Maybe if they expect to upgrade within a few years it would be fine. But when I built my current computer 11 years ago I also didn't expect to need 16 gb of ram and only bought 8. 5 years later 16 gb of memory was a requirement for both software and games I was playing. And now 11 years later 16 gigs is not enough for fairly "simple" 3d modelling and 32 gigs is pretty close to the minimum requirement to fully utilize other modern hardware.
Speaking of 11 years old, I just put my 4790k out to pasture. It was a good CPU for a long time, but it got a little long in the tooth for modern workloads.
I bought 2x16gb for my home computer at $90 about three months ago. When I checked the price of the exact thing I bought just in the past day, it's now $270. The price increase is across the board whether it's a low end or high end build.
> Memory: 16 GB GDDR6 SDRAM
So unless the RAM price jumps to 4x the price of a PS5, getting a PS5 is not the most cost efficient way to get to 64 GB of RAM.
In comparison, PS3 has been used to build cheap clusters[2].
[1]: https://en.wikipedia.org/wiki/PlayStation_5
[2]: https://en.wikipedia.org/wiki/PlayStation_3_cluster