I know we've done our bit at LB with coolbox bikes, front wheel drive recumbents and the like but this deserves a mention and viewing...
https://www.cyclingweekly.com/videos/watch/watch-rear-wheel-steering-singlespeed-bike
Articulated bikes are nothing new of course...
One nameless forumer had a front wheel drive, moving bottom bracket Cruzbike recumbent. I couldn't get the hang of it as totally different from a 'normal recumbent'. Totally three dimensional and could fold in half any time until you learnt to relax and just work with it.
Was very fast but leg steer was a problem if you had to slam on the anchors quickly.
In NL the articulated front wheel drive Flevobike was rated as able to sort out real riders from 'poseurs' too.
Often see these offered on ebay.
Rigid front wheel drives are easy to use in recliner land. Raptobike from NL being a design we had way back in 2008 - Arnold the designer helped @Ken and handcycle team at Battle Mountain a few weeks ago. Is a very small world! @Dave on this forum had a Rapto and commuted to Dunfermline on it 'quite quickly'.