It appeals to big structures, because they often have many clients but much less backend endpoints. If you have one server side code base but targets the web,

It appeals to big structures, because they often have many clients but much less backend endpoints. If you have one server side code base but targets the web, the mobile, an customer api, a desktop client and embeded devices, it's a net win. However, if you just have web + mobile, the complexity may not be worth it.