We've given up using our folding kitchen as it was irritating to put it up and it seemed to take up a lot of room for the space it produced.
We use a large table which has adjustable legs as a cooker/prep and at the moment we just use a cheap old Woolies table for eating. We'd like to buy another decent table to eat at if we've got some pennies this year.
The advantage of tables to me is that you can pack bags and boxes underneath the table, we use Val's modular packing theory so everything travels in coolbags and just gets lobbed into the kitchen tent or the Cabanon.
Fire safety - I am the woman who nearly set fire to a borrowed canvas tent by setting fire to the grass adjacent to a windbreak that was up against the tent. I was saved by a friend having much better reactions than I did AND that was in the rain!
Groundsheets - we don't ever have groundsheet in our kitchen area, too much faff - if you spill stuff you have to mop it up!
edited to add: IMO tables take up very little space as long as you size them so that they can sit in the bottom of your boot or roofbox.
We have one table in kitchen area for preparing etc, and a larger one to eat off in the living area, we have a cooker stand with shelves under to. All the food stays in the bags it came in!
Optimum number of tables = no. of people (children and adults) / space available in the car/van/trailer * expected function (inside, outside, cooking, dining etc) * available budget to spare....
If you fancy packing and unpacking lots of kit, then you take it. Your holiday, your choice. Whatever works for you.