boring is what you already know and don't need to spend a lot of time learning, or, if you don't know any, then it's what is widely known and well documented.
Look at 'boring' php, facebook was using this language at scale, so they had to develop a just in time compiler for the whole thing. Python didn't have that problem, so it still doesn't have a just in time compiler (for the default interpreter)
Also look at all the changes and action in the JDK (ever since JDK11). Is that also boring?
yes, that is true but i think that supports the point: use boring tech to solve interesting problems.