Historically, in the West, while SIGNS have been used at least since the time of Claudius Ptolemy, fact is that use of stars and constellations (including the zodiacal constellations) was at one time (at least) ALSO widely practiced (really only started to fade around the Reformation period in the West) Now, one did not supplant the other, rather one (the signs) were looked at as "fixed", and the other, the stars/constellations (and other asterisms, ie the Lunar Mansions-known as "nakshatras" in the East) were looked at as dynamic or variable. For example, say the ascending degree were in the SIGN of Taurus-well that would be a Taurus ascendant; but say also that this ascending degree were near (conjunct) a star belonging to the CONSTELLATION of Aries: in this situation the oldtimers would have said that the ascendant in this case were Taurus, but MODIFIED by Aries, via the Aries constellation member-star that the ascending degree were conjunct with.
Now, contemporary hard core siderealists just reject the signs outright-claim they are an historical error-and only consider the constellations; but the oldtimers (in the West) while giving primacy to the signs also accorded due consideration to the stars/constellations, when these conjoined important horoscopic points, and when they conjoined planets.
Personally I think this now long forgotten outlook, is superior in its delineative results, to the pro/con partisanship which has come to dominate this issue...