Nowhere in the linked discussion predicted the doom of Reddit. In one of the threads, the Lemmy Dev said:
"The ability for anyone to host a link aggregator, and build federated communities outside of the largest centralized services, and particularly outside of the jurisdiction of US-based companies like Reddit, has large implications for media sharing and online discussion."
Don't forget that the Lemmy Dev is a tankie, and what the implications really meant to them.