I like a kitchen/ dining room because it's a shared function, and plates have to move back and forth between those two zones anyway. Ours was knocked through by a previous owner and having seen the original layout at the neighbours, it works well as with some tweaking of the layout, dead corners where there had been doors became more efficient and the kitchen layout extended.
If it's a living kitchen with space for a sofa, but there is a proper, separate lounge, that's fine. If all the reception/ kitchen/ dining space is open plan, I'd find it too open and noisy.
The reality is that most British homes are small. Most people don't have the spare playrooms/ offices/ utilities/ dens needed to make open plan aspirational. Open plan in Britain often does become difficult for managing heat/ draughts. If walls are removed, that's less surface avaliable for installing adequate radiators. When our layout was changed and patio doors put in, they took out the wall with the radiator, didn't replace it and left a large room with no heating! The first winter we lived there, a large radiator was installed... but that was the only open wall then used up. It's easy to say "it's open plan being done badly" but that's the reality most people have to put up with because there isn't the space, budget and blank slate to do it the aspirational way. If you're really getting into aspirational design, people with mega money have public immaculate "stunt kitchens" for light use and hidden "sculleries" where the dirty stuff and serious storage take place
I like cosy and soft furnishings to absorb noise and retain heat. I like being able to tidy one room at a time and see a result.
The more we can seperate and contain noise the better, especially for autistic DS1. It's also important for my sanity to escape the gabblings of gaming youtubers from the TV (inane as they are, at least I can casually monitor what the DCs watch which is better than on tablets)