I’ve thought about putting one on the front wheel of my trainer bike because I’m too lazy to pump up that tire on a regular basis so I end up riding half the winter in Zwift with a flat front tire. Other than that, I can’t think of a single application I’d want to run a solid front tire on.
No worries though, Synthetic will be along shortly to call everyone who’s not running Tannus tires a bunch of wankers.