In postgres not much has happened around geospatial in core, because there's a lot happening in postgis. FWIW, you can define additional types of index access

In postgres not much has happened around geospatial in core, because there's a lot happening in postgis. FWIW, you can define additional types of index access methods in postgres (from scratch), or you can gist / gin / spgist access methods where you need to care about a lot less. All are used in the wild.