There are plenty of problems of physics in the RAM design, and it's hardware designers jobs to find the operating regime where those problems do not matter.
I mean, if you had a DRAM labeled "DDR4-3200" but it can only work at a much lower speed (say DDR4-2400), it's clearly a problem of physics - the gate capacitance is too high, the driver transistors are not strong enough. And yet my reaction would be to take that RAM back to store and get my money back, not to defend manufacturers which claim false things about their chips.
I mean, if you had a DRAM labeled "DDR4-3200" but it can only work at a much lower speed (say DDR4-2400), it's clearly a problem of physics - the gate capacitance is too high, the driver transistors are not strong enough. And yet my reaction would be to take that RAM back to store and get my money back, not to defend manufacturers which claim false things about their chips.