Sold my 2008 Cali late last year, to realise the strong resale value (especially due to supply/demand.) A few other factors influenced my thinking: 1. Most campsites were only allowing self-contained units. 2. The Cali had ceased to be my daily driver for just over 12 months. 3. It had reached an age (and mileage) where potentially it was about to become a money-pit.
I'm about to take delivery of a 5.4m Ducato based van conversion, which to me seems the next logical step. I don't envisage returning to VW anytime soon - it was fun, and fitted the bill for 12 yrs/120k miles, but I won't miss hideous pricing for Control Units (3 in 12 years,) or side door closing mechanism (>1k, when the part alone was less than £100!) Both the preceding items of course only available from VW. (Kerching!!)
I did briefly consider another Cali, but the facilities and finish of the new van are IMHO both superior, and - more importantly - I have what I consider to be better spec, better suited to my needs now, and at a vastly cheaper price than a Cali.