Sometimes complex wins over simple

A single complex solution is better than many simple ones
If everybody uses the same code, everybody wins
Even if there may be some performance cost
Sometimes the compiler can optimize away complexity
__builtin_constant_p() often helps
or structures that downgrade to identity assignments

Example: Linux virtual memory
The various CPU types organized their pate tables in 1, 2, 3 or 4 levels.
Linux code is working with 4 levels, always.
The same code is used for all CPU architectures
Code is laid out so to optimize away some levels

Design a generic API that covers all cases
This avoid conditionals in the calling code
Then, some back-end may miss some features and error out