This retopo tool can be used for modeling!

[@HandleDheez]

The cut from 2:58 to 3:00 made me chuckle

[@konzeptzwei]

is poly-quilt an external addon or part of blender?

[@Art-of-Akrosh]

Part of blender now. Make sure to have version 4.2.3 and above for this to work. You can turn it on by heading to preferences, get extensions and search for polyQuilt.