ARM Linux isn't really slimming down, so the chips need to grow to catch up. You're starting to see devices like the Renesas RZ/A1H that has 10MiB of SDRAM on

ARM Linux isn't really slimming down, so the chips need to grow to catch up. You're starting to see devices like the Renesas RZ/A1H that has 10MiB of SDRAM on the die and can boot Linux out of a single cheap QSPI memory part.