Having to deploy and manager Clickhouse put me off a little - OpenObserve uses it's own binary format, so there are zero external dependencies, making it super easy to setup. Maybe Clickhouse is nothing to worry about, but it's something I've never used before.
Also, I wasn't sure if Zookeeper was mandatory even for a single-server SigNoz install?
SigNoz UI certainly looks more polished tho!