Yeah that crossed my mind after posting. Same goes for dB vs linear amplitude (although in some cases you may actually want both, for different things).
Interface wise, it’s probably not too hard to have an optional @scaling attribute or something like that (though log-log should be the default for spectral stuff). Just a bit tricker for something like loudness where you may want dB for normal matching/ML shit, and linear amplitude for weighting. That being said, the latter could just happen as a separate @weighting attribute in fluid....spectralshape~ where you give it a loudness buffer (in dB) and it sorts itself out in linear amplitude.