2020 showed us that Decentralized exchanges have a lot of advantages and they can be really comfortable to use. There is only one problem, which disturb to make it more popular - high fees. When it will be solved some way (some already have decisions like layer 2 etc), DEXes commuinty will grow and maybe CEX will be less populr than now. 2020 was a start year for DEXes. The main game starts only now, I think
Layer 2 is the next battleground for sure. It makes the difference between a DEX feeling like a CEX and it feeling slow and having no liquidity.