> There isn’t a cap on validators so you can’t buy up a fixed percentage of the network
you can during a pre-sale or pre-mine event
> More people can always join
joininng as validator means convincing another validator to reduce their stake (sell it to you), which is a form of permission.
> You will be diluted over time unless you choose to reinvest
you can't be diluted if you don't sell you stake and continue staking. that's just by definition how PoS works.
> PoS increases both the cost of a direct attack on the network as reorganised/51s are more expensive to perform with slashing mechanisms in place, and also removes the threats of supply line disruption by either nation states or cartels forming to control the flow of the hardware.
nope, literally none of it is true.
slashing mechanisms only obfuscate the attack, they don't make it more expensive. in fact they reduce security by virtue of piling more and more rules that require more and more code, which inevitably contains bugs.
threats of supply chain attacks are much less scary than threats of long range attacks from hacked / overtaken private keys of early / current validators.
producing more hardware to counter an attack might be expensive and early iterations of hardware can be inefficient, but at least nobody can stop you from producing it. as i've already explained - if somebody gets a stake in pos system, there is nothing you can do to reduce it.
pos simply doesn't work. it's been known a decade before pow and was just never considered seriously because it's not trustless and permissionless.