For what it’s worth: plenty of people would refer to it, broadly, as classical music.

https://en.m.wikipedia.org/wiki/Classical_music_(disambiguat...

It’s not music from the classical period. Indeed, it’s from the baroque period. But in my decades of talking about and performing classical music, the term has never led to confusion.

You're replying to someone who did, and plenty of others do. Language is fluid and flexible.

There are two uses of classical in modern parlance: classical as in the classical Mozart period, and classical as in anything that spans from Baroque to the late romantic Rachmaninov era and other composed music that uses largely traditional harmony or atonal music along the lines of Shoenberg.