Update README to mention Curvlinops

README.md

@@ -61,10 +61,12 @@ One can also implement custom subnetwork selection strategies as new subclasses
 
 Alternatively, extending or integrating backends (subclasses of [`curvature.curvature`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/curvature.py)) allows to provide different Hessian
 approximations to the Laplace approximations.
-For example, currently the [`curvature.BackPackInterface`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/backpack.py) based on [BackPACK](https://github.com/f-dangel/backpack/) and [`curvature.AsdlInterface`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/asdl.py) based on [ASDL](https://github.com/kazukiosawa/asdfghjkl) are available.
-The `curvature.AsdlInterface` provides a Kronecker factored empirical Fisher while the `curvature.BackPackInterface`
-does not, and only the `curvature.BackPackInterface` provides access to Hessian approximations
-for a regression (MSELoss) loss function.
+For example, currently the [`curvature.CurvlinopsInterface`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/curvlinops.py) based on [Curvlinops](https://github.com/f-dangel/curvlinops) and the native `torch.func` (previously known as `functorch`), [`curvature.BackPackInterface`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/backpack.py) based on [BackPACK](https://github.com/f-dangel/backpack/) and [`curvature.AsdlInterface`](https://github.com/AlexImmer/Laplace/blob/main/laplace/curvature/asdl.py) based on [ASDL](https://github.com/kazukiosawa/asdfghjkl) are available.
+
+The `curvature.CurvlinopsInterface` backend is the default and provides all Hessian approximation variants except the low-rank Hessian.
+For the latter, `curvature.AsdlInterface` can be used.
+Note that `curvature.AsdlInterface` and `curvature.BackPackInterface` are less complete and less compatible than `curvature.CurvlinopsInterface`.
+So, we recommend to stick with `curvature.CurvlinopsInterface` unless you have a specific need of ASDL or BackPACK.
 
 ## Example usage