I have been a caravan owner for about 40 years but recently changed to motorhome. It's a Bessacar 442 which we have used and liked but are still not sure we have done the right thing. Not having the car.
New Member, welcome over from the 'Dark Side', as we like to joke.
Many members have progressed from being Tuggers. Like barryD I never went through that phase - my progression to MHs was via a boat for 30 years.
You question whether you have done the right thing, which is why I mentioned my boat experience.
I imagine that like most caravan owners you went onto sites most of the time and maybe did not move too often, maybe because of set-up/break-down times - we are usually from handbrake, gas on, fridge changed, chairs out to beer/wine open about 5 mins. Leaving is quicker.
On my boat I never had a 230v circuit so did not need to go into marinas, which left me free to drop anchor in beautiful bays.
I think that a MH gives one similar freedom providing one does not need 230v, or limited amount via an inverter.
Your main question was will you miss the car?
Well as said above there are alternatives, like scooters(if you have the payload) pedal bikes or electric bikes(charging if wildcamping?)
However it depends where you want to tour?
If only UK getting near to town/city centres is difficult in a MH, but maybe public transport is available.
If touring on the Continent, one can use Aires/Stellplatz which are often nearer to villages/towns than campsites.
Other people achieve local transport by using public transport or hiring a car for a couple of days(delivered to where you are). A few days not paying campsite fees can cover car hire.
I think that using some of the suggestions being aired on here you may overcome the loss of the car and that the other advantages of a MH over a caravan will outweigh any disadvantages.