IMO that was a really weird choice that everyone seemed to make. DDR5 2x64GB before the spike was like $250.
I had not much justification to NOT go with 64GB for my pre-COVID build.
It seems that a lot of PC building people are confused too deeply by Intel marketing and fixated on getting the flashiest CPU attainable within budget. Similar things happened with previous AI hype, and some people were using HDD boot drives on GPU rigs and asking others whether low end i7 would cut it. They acted very confused when told that they need SSD and Pentium is plentium.
I mean, there is a shortage going on, but when it'll be over anyhow - whether due to all the last three standing filing bankruptcy or CXMT-Huawei starts delivering in shiploads or Kioxia enters the market - and it comes back down to $2/GB, or even $5/GB, just max it out and forget about it for 10 years. Why not.