It was popular in the late 2000s/early 2010s for low-spec machines, virtual machines, and tech enthusiasts who wanted a minimal Windows 7.
Using an unauthorized modified OS carries significant risks: tiny7 rev03 unattended windows 7 install by experience
You can’t just burn a DVD anymore (good luck finding one). Here’s the tested method: It was popular in the late 2000s/early 2010s