Currently going through this debate as we are soon to replace our kitchen.
We decided on a double oven to start with as that’s what we have now. We tend to only use the main oven section of it. This is partly because it is a crap old oven that needs replacing & doesn’t work very well.
But, we very rarely use both ovens at the same time. So, we then thought perhaps we only need a single oven.
Then we realised you can get compact ovens with microwave function, so to get rid of the microwave on the worktop we are now erring towards a single oven and a compact oven with microwave.
But we do regularly use an airfryer too, so I wonder if we are going to have massive oven overkill and appliances that don’t really get used.