I tried using Linear before switching to Obsidian Kanban. I found Linear's UX and site structure to be overly complex for my personal needs. Despite following the onboarding process, I found myself clicking too many times to figure out where things are (I acknowledge that this may have been an issue on my side). As a result, I switched to Kanban because I was already using it to store documentation for my projects. For me, it meets the spec as a project management tool and is an improvement over a text-only kanban. I can definitely recommend it.