You can load/save samples from H5, but you can also drag and drop one or more samples directly from within Cubase. Maybe a slightly less inaccurate term would be to call H5 an “integrated sampler”.
I think that the term sampler, is more geared towards the option to mangle (with) samples, as was possible in traditional samplers besides their ability to record. Recording really was more essential in those days too though since communication to the outside was fairly limited.
I think that most plugin samplers on the market do not “sample” on their own, or in its own environment. (Or maybe that’s old information, but that certainly used to be the “norm” for software samplers.)
It would be cool if Steinberg made a set of inputs available in H5 (via a simple side chain or whatever) that H6 could then record to a sample. Nothing more though (if even), just a simple routing choice directly from Cubase (or other host).
I mean, how could (or should, maybe the question should be) a record feature in a sampler compare to the recording features available in a recording suite such as Cubase? I mean, why have two sets of recorders, of which one can only be used in a single application?