A tweet from hardware leaker @momomo_us reveals that Intel’s future Arrow Lake CPU architecture could drop DDR4 support entirely in favor of DDR5. If true, Arrow Lake will be Intel’s first CPU platform to support DDR5 alone, just like AMD’s latest AM5 platform and Ryzen 7000 series CPUs.
Arrow Lake is the codename for Intel’s 15th Gen CPU

Source: Hot Hardware – Intel’s LGA 1851 Socket For Arrow Lake CPUs May Make DDR4 Memory Obsolete