We very, very rarely have takeaways. We do eat out at lunchtime quite often - inexpensive but nice places.
I don't usually enjoy takeaways. By the time they'redelivered to you or you've picked them up they're not that hot and don't taste that nice in my experience.
Restaurants switching to take away food and takeaways are allowed under the rules. I suppose food is essential isn't it? There are presumably people who do not have the facilities or the ability to cook (eg people with a learning disability, people with arthritis, etc,etc,). If an off-licence is considered to be essential then I can't see why a takeaway shouldn't be.
Personally, during this crisis, I would be a bit nervous to eat anything other than food we have prepared at home.