Certain things you might take for granted around hardware (The author mentions Wireless on intel AX210 and a bluetooth stack) are missing or in a poorer state then you would find on your "typical desktop" OS. Additionally there are plenty of Linux apps that will make dump assumptions that they are running on linux.
Things will generally be a lot more manual to setup rather than auto-magic. OpenBSD is focused on software correctness (security / reliability) over all other attributes (performance, features, ease of use). As part of this there are natural additional focuses on simplicity (to make it easier to be correct). Thus OpenBSD is rarely going to be the first with something that isn't security related.
If your workflow is heavily UNIX based, then OpenBSD can make an awesome Workstation OS. If you work on open source, you will have everything you need. However if you work with other people on other platforms you will see incompatibilities, such as being limited to web based versions of Collab services (discord, teams, slack).