At this moment DDR5 reminds me of the differences between M2 NVME Gen 3 and 4. On paper, and with some benchmarks, you will note potential differences.
Those do not translate too well in many peoples day to day use. An exception for the M2 Gen 4 drives could be in transfers from and to a similar drive.
For those who insist on being early adopters great, but DDR4 is not "old" but established and great performing tech that is affordable, just like Gen 3 drives.
The exception for the drives could be in console use. Other than that just wait it out and enjoy some, relatively, affordable tech. Don't get much of that these day.