It sounds like ot is still in beta (but it's a little confusing that they're 1.0 but it has a message saying they're in beta on their main page).

It looks like it's being adopted by a few larger app monitoring products, wondering if datadog will follow suit or if they will stick with open tracing and their custom implementations for logging and metrics. I assume they will support ingestion from ot at some point though. It sounds neat tho, will definitely read up on it more.