Lag on the public WDQS servers is climbing, reaching > 12h. This makes a lot of workflows unusable.
We don't have a clear understanding of what exactly is going wrong. Update rate is a recurring issue, we might just have reached a tipping point. There are a few potential medium term improvements:
Also, T221774: Add Wikidata query service lag to Wikidata maxlag should in the future suspend most Wikidata edits if update lag is too high, allowing the servers to recover automatically.