Had several of both and learned the table and chairs has so little true comfort if sitting for any longer periods other than quick eating. The dinette gives a a lot of hidden storage right in the kitchen area under the thickly and firm cushioned seats for those heavy liquid bottles and canned goods in easy to slide plastic storage containers that so easily slide on the carpet in there and like having an additional pullout pantry down low. Nothing can move while traveling because it's walled on all 4 sides. That's important because dinettes are usually over or very close to the RV's wheels and keep unessary added weighty items off the pin or ball front end.
Our dinette seat backs are not uncomfortable at all and if wanted some find they are, a throw pillow behind your lower back makes them far more comfortable than any of those hard thin chair seats and backs that push on your bones. Cheap RV usually have lousy quality foam cushions on their dinettes and they bottom out, we've found. They are nothing like the very good quality cushions some RV's have. Huge differences! Buy cheap, get cheap!
Also the dinette easily converts to a very comfortable bed for 2 if and when needed and that's unbeatable. Dinettes have many multipurpose features/uses while table and chairs have so few. Then add in that when using the puter on the dinette table, I can swing my legs up on the rest of the seat cushion and sometimes even put a throw pillow behind my back and just lean back and it's like a soft cushioned recliner. Real comfort when surfing or researching etc! Sure is nice when using the puter or just us two talking and/or snacking or daydreaming when it's cold outside or windy or raining. So darn comfortable that we often doze off for a little nap. So relaxed!
A real PIA with 4 present for the inside person to get in and out with chairs but so easy with a dinette as they can simply slide out. For sure, no tables and chairs RV's for us again as we've learned the lessons well!
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