Proof of Work systems just have some forms of limitations for an average user. With the 2021 chip shortage resulting in scalping of GPUs and consequently highly expensive systems to operate proof of work farms, it isn't feasible any more. Added to this is the long period one needs to wait to recoup investments on PoW systems as currently mining may not be as rewarding as it used to be, especially for small users.
So, at this stage, PoW may be left for bigger individuals and institutions. Proof of Brain and Proof of Stake as well as Proof of View systems look more promising with very little barriers to entrance for an average user.
My thoughts though!