I bought a new gas oven a few years ago. Maybe my experience will be relevant enough to be helpful.
New ovens are much better insulated than old ones. The exterior dimensions are the same as the old one, but the interior is noticeably larger, and the house doesn’t heat up nearly as much when the oven is on. It also pre-heats much faster.
My old oven was terrible, so maybe some of that is just from upgrading, but I think most is better technology.
I bought a large main oven, with lots of features and three racks, and a small lower oven with just a dial for heat. We mostly use the lower oven to store cookie trays and the broiler and such, but for large parties I pull that stuff out and can use it to bake two pies or a large lasagna or a few casseroles or other short food. I have really appreciated the flexibility of that second oven space.
I’ve also loved having three racks. I usually just use one, but it sure helps when baking cookies.
Other than the regular oven and broil settings, the only other feature I use in the main oven is convection roast. I’m afraid to use convection for baking, because baking is fussy and I feel I’d have to experiment with all my recipes. But convection roast is awesome. Roast birds, in particular, cook much faster. Think turkey. And all my roasts come out better, beautifully browned, juicy inside. I’m pretty good at the art of roasting, ymmv, but I’ve loved the convection roast feature.
The gas range doesn’t boil water as fast as I’d like. But it’s better than what I used to have. We have four real burners plus a fifth long narrow burner in the center, that I mostly use to make gravy in large roasting pans. In theory, I could use the griddle attachment, but my husband is the pancake guy, and he likes to use a pan and flip them. We have two regular burners, one small “back burner” which works well for simmering, and a large front power burner, which isn’t as powerful as I’d like. The regular burners are great, though. And the large one works well with the wok.
The controls are in front. Bad for small children, but great for cooking hot things, when you don’t want to have to reach over the burners.
My oven is quiet, unless the fan is on. A friend bought a new range recently, and it’s incredibly noisy. It has a fan to keep the electronics cool. He said, “we paid extra to get a quiet dishwasher, but never thought we had to ask about the stove.” He hates that “feature”. It’s worth asking.