I would say that no host should ever need this for any kind of format. But as it even happens to creators of plug-in standards that they think they have to rely on filenames - maybe a concession to rouge plug-in makers? - for identification of a plug-in, I really don't know.
CLAP nonetheless has an arbitrary length text identifier which is recommended to use the reverse URL scheme, e.g. "com.u-he.Zebra2.clap", such that, I mean, who needs anything else then?
(which of course might not stop someone to use "1234" as identifier, or host developers having a mental lapse thinking "oh, this is too long, let's save the plug-in path instead")
