You're correct that were architectural reasons initially for why Apache httpd 2.0 not considered, but the license also played a significant role in later years, when it became obvious that Apache 1.3.x was showing its age.
nginx was initially considered, but the upstream wasn't receptive to patches that OpenBSD worked on, including a chroot(2) support and security patches, i.e: reallocarray to protect against arithmetic overflows. At the time, Nginx cared more about it's Nginx PLUS offering and less about the community.
nginx was initially considered, but the upstream wasn't receptive to patches that OpenBSD worked on, including a chroot(2) support and security patches, i.e: reallocarray to protect against arithmetic overflows. At the time, Nginx cared more about it's Nginx PLUS offering and less about the community.