DDR5 has come down a lot in price so it's not really an issue.
1) 32GB DDR5
is still almost double the price of 32GB DDR4
2) If you already have 16GB DDR4, and most people do, the cost of DDR5 is a flat $60-$80 tax for 16GB DDR5.
In both scenarios you are spending a $60-$100 extra for DDR5.
The 1%-2% you gain from DDR5 is not worth that price for most people. You are much better off buying a higher tier CPU or GPU if the goal is good bang for the buck.
Of course, one could argue that you "invest in the future
" by buying DDR5 now, but then again, I could just as easily wait for DDR6, or USB4, or GPU that will finally fix shader stuttering, etc.
It's a matter of perspective. To me the shader compile stuttering in PC games has become a way bigger issue than plain FPS. I assume next gen GPU will fix this, they will have to.
We are also in a period of massive inflation, where people are more worried about paying their groceries, heating and electric bills, than how much FPS they gain in Fortnite. It's not a great time for AMD to launch an expensive platform.