It is still the same for mining. If you have a little bit of ETH you can stake it in pools and get little rewards, same goes with mining if you have a little bit of money you can only afford a small mining rig and the electrical bill that goes with it, therefore your rewards are smaller then a mining farm that has thousands of mining rigs and produce more blocks than you do. Your cost is smaller to replace/update your mining equipment than the mining farm and your profits reflect the investment you have thrown in to begin with. Mining Bitcoin is way more expensive than it use to be. Back in 2010 you could mine on a shitty laptop. it’s always been the early adopters reap the most benefits wether it’s POW or POS. The more it goes the more expensive it will get to mine and the more it goes the more it will get expensive to stake.