due to the recent MPI cleanup work in science, which has reached Factory meanwhile, there are a few new choices:
python3-vtk: python3-vtk python3-vtk-openmpi python3-vtk-openmpi2 netcdf13: libnetcdf13 libnetcdf13-openmpi libnetcdf13-openmpi2
Please add Prefer's for the non-MPI variants.
Note, for netcdf there already is "Prefer: -libnetcdf13-openmpi". There is also "(+)netcdf11", which no longer exists.
Btw, is there a better way to specify this, especially for versioned libraries?