I'll tell you how you do a super light dropper on a road bike - a modified version of the Zipp beam. Of course, the damn UCI would need to get out of the way...
Another use aside from allowing a more aero tuck would be to allow you land a big drop-off - seat height is definitely the limiting factor for that; more than a foot gets pretty silly fast. But the rest of the bike can hack it, as evidenced by all those Road Bike Party vids.
Last edited by Kimmo; 07-11-21 at 08:14 PM.