service/prometheus.md

@@ -1963,6 +1963,8 @@ general, and our setup in particular:
  - high cardinality metrics from exporters we do not control can fill
    the disk
  - no long-term metrics storage, issue: [multi-year metrics storage][]
+ - the web UI is really limited, and is actually deprecated, with the
+   new [React-based one not (yet?) packaged][]
 
 In general, the service is still being launched, see [TPA-RFC-33][]
 for the full deployment plan.