There is no point competing on desktop apps, even Linux has a very hard time there. BSD variants have always lagged behind in that area, you could have probably written the same comment 15 years ago by just moving Openoffice etc to the “Linux only” group.

The areas where OpenBSD can compete (in addition to the ones it already fights in, like routing and network-edge roles) are cloud deployments and orchestration. If it were as easy to run OpenBSD for development as it is a containerized Linux, people would pick the more secure choice. They could also make prebuilt appliances for the most sensitive components in a deployment (databases etc).