Yes, for a while that was the only "serious" option for Windows

Yes, and Logic Pro was generally looked at as 'My first DAW' in most studios I have been in.

Also Protools was available on Windows from 1997 and was used in many PC based studios.

I remember Logic Pro becoming quite popular after version 8, even though veterans who knew protools backwards had no reason to switch, a lot of the newer studios used logic.

You're right about protools on Windows. I got confused about protools not requiring the use of their own interfaces