based on what criteria? temperature rise for outside track inside thermally insulated to FR4?
Lots out there. But for big jobs like Stovetop heater Relays, OEM thruhole busbars and crosshashed solderblobs are often done.
Then designers forget to reinforce large parts with polyurethane to prevent solder annular ring break in solder joints and boards fail within years even in benign home and office environments. This can also happen when holes are too large and looks under a microscope like a crystalline annular ring between pin and hole connected to a large trace carrying large currents. ( i.e. intermettent open connection) Oxidation ends up opening the solder joint with an insulation oxide in a solder joint that otherwise looked flawless when new. Just a heads up... from a stove top board and MAC CRT monitored , I once repaired with large traces and big parts.
MOST PSU's you will find use this on big parts to hold them from vibrations.