#OSM's senior SRE, @Firefishy, tells us that the new server was required because we were running out of capacity in the US. It will be used for renderings/updating the default map style used on https://osm.org.
Here are the hardware specs: <https://hardware.openstreetmap.org/servers/piasa.openstreetmap.org/>
@Firefishy Mappers in the USA should now see their map changes more quickly.