Bitcoin Daily Reading Inquiry - Timelock Purpose

After reading a brief snippet about timelock, it made me curious if early adopters could have used it to prevent getting weak hands and not hodling coins deep into the future. The thought of some early adopter timelocking their wallet with 10K BTC for 15 years was quickly squashed after reading further that the maximum allowed time is 388 or 455 days due to potential security risks.

From a programming standpoint, what purpose would the creators have wanted to serve with this? I looked at fee sniping prevention, but it says only about 20% of transactions use timelock. What other modern applications do or will benefit from this?