I've been a big fan of rallying (and hillclimbing) since God was a lad. TBH, since Citroen/Loeb and VW/Ogier have been dominating WRC I have lost interest. My preference is for ERC (it has more tarmac events too, which is a plus).
My collection of slot WRC cars stops at 2010, partly because after then SCX only did the DS3 and Fiesta. The Mini and Polo offered by Scalextric don't suit my criteria, and none of the slot manufacturers (yet...?) offer either variant of the i20. Unless SCX or Ninco offer more 2011-spec World Rally cars, I won't be expanding my collection further.
The 2017-spec WRC cars are more like "Group B lite", and I'm not sure that it's necessarily a good thing for the championship. The FIA observers have already cancelled one stage this season, on safety grounds, because of what they deem "excessive speed". Massive aero just looks so out of place on a rally car. IMO the Yaris, in particular, is butt-ugly. That rear wing leaves me speechless - and not in a good way. R5 cars are much more aesthetically pleasing.