After the Africa Special it was announced that DIDs and academic records of 5 million+ people will now be stored in the Cardano blockchain and this is set up to scale for massive adoption. Thus it raised the doubt: where does all of that information will be stored, in addition to cryto-transactions and the whole ecosystem that will be built? I mean in contrast to centralised institutions that own big computer clusters for the equivalent purpose, Cardano nodes can run on regular PCs, so how is it possible??