PoW can have PoS like impact over TIME (given a negative view on human factors). Ie if you HODL you get more spending power for not doing much and this can compound, but with Bitcoins PoW is exposed to ENTROPY during time in a PHYSICAL way which PoS is not... PoS is VIRTUALISED and ENTROPY, therefore long term decentralisation, can be REDUCED over TIME (governance, control, RAID)... Bitcoin PoW is fundamentally linked to the environment with ENERGY (infrastructure, natural resources) so ENTROPY should keep the distribution of bitcoin decentralised at a level that MATCHES that or the REAL WORLD.