The first use case that comes to mind is if you want a DSL to build expressions that are evaluated later in some different context e.g. when using `polars`:

```python df.filter( pl.col("foo") == pl.col("bar"), ) ```

Sqlalchemy does something equivalent too, and I'm sure there are many others.

Well personally I’m not a fan of turning everything into an object, but if you have properties or methods that exist upon the concept of Equality you might want to encode directly onto a class. Maybe in a domain where “Equality” is an important concept, like mathematics or even something like accounting.

Could enable a different interface into approximate equality for floating point numbers: Equality.approximate(iota: float) -> bool