Device Chain vs Effect Chain

Today I realized that Device Chains and Effect Chains are both saved as xrnt files. But they are not necessarily saved in the same places. The drop down in the top right corner of the Sampler Effects section directs you to the Effect Chains folder in the User Library. But saving a Device Chain by right-clicking and selecting Device Chain / Save As… takes you to your most recent active folder, or something, but at any rate NOT necessarily the Effect Chains folder.

So Device Chain xrnt files could be saved in a separate directory than Effect Chain xrnt files.

Is it important to store Device Chains separately from Effect Chains? Is it important to store all xrnts together? Does it depend on how they are being used?

Thanks!