A new "Show CRS accuracy warnings for layers in project legend" is provided which, when checked, will display a new warning icon identifying any layers with a CRS which is identified as having accuracy issues.
Examples of low-accuracy layers might include those with a dynamic CRS with no coordinate epoch available, or a CRS based on a datum ensemble with accuracy that is found to exceed the user-set limit.
This option is disabled by default, and designed for use in engineering, BIM, and other industries where inaccuracies of meter/submeter level are very dangerous.
This feature was developed by Nyall Dawson