Yes. If I remember correctly (and I might very well not - and the documentation is sparse to non-existent on this!): In the olden days, Recordings used to be called Tracks, then they got renamed in NGS, and then at a later point, we realised that we actually did want unique Track-as-on-Release IDs as well, so we made a new Track pseudo-entity. MusicBrainz was around for ~11 years before NGS though, so there are a lot of legacy tags, so we couldn’t just repurpose them.
Please let me know if I get the history wrong (@CatQuest? @kuno?), as I may want to put this info on the Recording/Track wiki pages.