Quote
Layer 3 protocols are applications that use Layer 2 protocols to offer specific services, such as decentralized exchanges, gaming, and social media. Some examples of Layer 3 applications are Uniswap, Axie Infinity,
i have no idea what layer 3 projects, i just googled it and this is the answer i got. seem not a very unique idea after all but they are just services with tokens such as the quoted above. it must be true L3 is just a made-up word word to persuade investors.
Do you think L3 networks are necessary? If not, why? Do you think they're overhyped? Your input would be greatly appreciated. Thanks. 
seem to be the use case of the crypto. it's necessary as it adds up the adoption. if the community is using those services, it serves the purpose.