Earlier quoted context omitted.
…how is efficiency different from scale? Right now Eth cannot accomodate the transactional demands of the world because it is extremely inefficient and costly (gas fees) I don’t claim to be an eth or PoS expert, but is it not the case that the transition to PoS is to lower transaction fees and prepare the network for sharding? Maybe sharding for scale is a totally separate issue, but I don’t understand why they would…
my understanding is that much of the motivation for PoS is to avoid the electricity usage, and in some but not other ways of measuring it possibly has some better security properties, not really increasing the throughput or gas fees?
Eth2.0 is supposed to be much faster than Eth1.0 anyway, they say it'll be capable of doing thousands of transactions per second (as opposed to the ~15 it is doing right now). It's partly due to the switch to PoS.
This might also bring down costs, gas fees are high because when you have only 15 transactions that can go through every second and you have thousands, millions of transactions requested every minute... well, a lot of pressure is built and that pressure is reflected on the gas price. But if you were to have a system that is capable of doing thousands, even hundreds of thousands of TPS then you would have very quick transactions and very high availability which would bring fees down.
Really, the only people that don't want POS are miners, a node in Eth2.0 is meant to be run on any home set up. Even a laptop, the most important part is for it to never go down.