Unused abstractions are tech debt, whether they were previously used or (even worse) never used. They constrain and complicated the addition of other features a

Unused abstractions are tech debt, whether they were previously used or (even worse) never used. They constrain and complicated the addition of other features and abstractions within the code. It's almost always easier to start with a codebase that is simpler and with fewer abstractions and take it in a given direction than it is one with lots of abstractions which don't suit the direction you want to take it. (and of course, everyone imagines that their abstractions will be in the right direction, but this is rarely the case). Unused abstractions are pure waste, because they take effort to make and effort to remove and never produce any value.