It's not a rule. It's traditionally how Chef's Tables are situated.
Here's a good description, including some history:
https://guide.michelin.com/en/article/features/evolution-of-the-chef-s-table#:~:text=The concept of the chef's,squeezed in at the pass.
In my experience, all other things being equal, a connecting cabin will be noisier than a non-connecting cabin. You might get quiet neighbors and not hear anything, but you might also get noisy neighbors and hear a lot, more so than with a non-connecting cabin. I would avoid it if possible.
Just be aware that it is not a Chef's Table in the traditional sense. It is not held in the kitchen, where a real Chef's Table would be held. It also uses a predetermined menu instead of the chef preparing dishes of his own choosing.
Yes. Not sure what either one has to do with my question.
48 says this:
"We’re booked next year for this same itinerary."
49 says this:
"Cruise will not be cancelled. Ports for cruises scheduled to visit Israel are being changed. "