my favorite speakers use ceramic-sandwich mid-range drivers. it’s very light and stiff, and i have found that it’s speed and transparency mates well with ribbon tweeters for a one-piece sound.....and a seamless mid-range-tweeter is super critical to my ears.
other driver materials seem to miss my preferred proper balance of ’life’, ’detail’, and ’tonal purity’. either they are too up front, too hard or too dull sounding. these are subtle things but for many years i’ve found my personal sonic viewpoint best with ceramic.
like any driver type, getting the most out of the ceramic mid range requires adapting it properly as it’s so transparent it can ring and such if not executed with great care. it’s not plug and play. but it’s ceiling seems to be higher when done right.....to my particular ears.
YMMV, my 2 cents, and all that stuff.