Why haven't we seen more about ICE trailers to EVs.

Question

Some time ago I saw an article about an internal combusion engine (ICE) powered generator on a trailor that was towed behind an EV (electric vehicle.) This seemed to be an intriguing solution to the problems of range to an EV and the problem of having to put a large ICE in a vehicle only to cover acceleration. I could easily see a transport solution of EV cars for sale and ICE gen trailors for rent for those out of town trips. Here are the cites:

http://www.evnut.com/rav_longranger.htm

http://www.acpropulsion.com/tzero_pages/tzero_Gallery.htm

Answer 1

I think few people want to tow trailers.  More likely to be widely adopted, IMO, are regenerative braking trailers pulled behind semi-trailor tractor rigs.