> Magnets are only used in spinning storage right?
Maybe not forever. Magnetoresistive RAM (MRAM)[1] has the potential to be both faster than DRAM and non-volatile (but maybe not configured for both at the same time), in which case it could replace both DRAM and flash.
That said, I'm not familiar with the physics of MRAM, so I'm not sure the Altermagnets mentioned in the article are applicable to MRAM in particular.