[JMT1985]

In the recent Grand Tours there were certain moments that were memorable or made me laugh - but the whole episode would usually be forgettable or not interesting enough for me to want to see again. The specials worked because they were something different to the regular format, changing to that format permanently just made it feel very repetitive - same thing, just a different location.

It was always going to be a three year deal initially for three seasons, with an option for more - however after three seasons Amazon looked at the cost and probably were happy to end the studio based shows. 

Remember in Season 1 they moved their studio tent around the world, costing them a fortune - and then from Season 2 they settled into a studio at Jeremy's home in the Cotswolds another massive amount of money to build and kit out. 

I feel Amazon threw a tonne of cash at them initially and then regretted it by Season 3 when they looked at ratings and how many new subscribers they attracted, hence why the specials format was created.