...array or alias seq slicing, appending, more ifs and elses, etc...

Is less intuitive because...

...compile times (evaluating sig constraints vs static ifs pretty much make no difference to the...

...details and really should belong in static ifs inside the function body.  This malady is...

...simpler than single exit (or nested static ifs)?

3) As experienced today, are CTFE functions...

...element type, leaving that for the static ifs inside the function overloads, which is definitely...

...that ought to be handled by static ifs inside a common function body, instead of...

...quality issues: pushing sig constraints into static ifs when they are more suitable, merging unnecessary...

I would say, depends on how you can implement what you need in the shortest...

Ah yeah thats useful, to expand a bit what about if the RHS is a...

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If your implementations are based on built-in operators, you could use mixins to unify...