Chapo is moving away from lemmy for now because lemmy is written in Rust, and Rust just didn't work out - there were issues with interfacing with DBs and with general maintenance as not enough people were good in rust.

The biggest reasons why lemmy proved inadqueate as a turnkey solution was insufficient moderation possibilities.

So, instead of lemmy, Chapo runs on their own fork, Hexbear.

The front end part is still mostly compatible though, so coming back to lemmy core isn't out of the question.

But if you want a quick solution to run a reddit style website, Chapo's Hexbear is probably the best.