We've been using Linear for a couple months. It's kind of like Superhuman in that the primary benefit is hotkeys. Otherwise it is an issue tracker. I think the reason we see a steady stream of new issue trackers is that teams are trying to fix with software what are people problems. New issue trackers feel faster for the same reason switching browsers tends to feel faster—you're getting rid of all of the crap you pil…
Imagine what would happen if everyone in an organisation had to use the same tool for text and code editing, say for some reason the PhB inflicted Word on the organisation as the only allowed code editor. Would that be good?
From my pov, most of the churn with ticket trackers is down to current solutions trying to own everything and apply a one size fits all model to everyone in the enterprise. The upshot being that the ticket trackers are invariably a sh*tty compromise for many/most individuals in the organisation. Think about the number of slides and reports that are hand generated for progress meetings in an enterprises. What about all of the various todo apps and systems people use? Why would so much effort be expended if the enterprise ticket tracking system was meeting requirements?
Fixing the problem requires using systems based on common standards that allow _individuals_ to use what works best for them but still interoperates freely with each other. fwiw, another shiney issue tracker will not do that unless its basic unit of tracking is something akin to a text file that can be shared with the next shiney issue tracker.