Problem is official definition is „not interesting, tedious” with synonym „dull”.
As much as I do get the idea, I can see how promoting use of tedious to use and dull tools is something that really misses the mark.
Well known and mature tools are still sharp and lots of them are not tedious to use.
What is the opposite of dull? Exiting?
I do not want my browser to be exiting. I do not want for it to change every week. Say moving buttons to different places. Changing how address bar operates. Maybe trying new short cut keys...
Same goes for most useful software. I actually do want them to be dull. And do their job and not get in between and make my day more interesting by having to fight against it.