A backend doesnt need to be all pretty and stuff, it just needs to work and be developer friendly. No animations and shenanigans.
You think same way as Cs-cart's engineers do..
Yes you don't need it to be pretty if your store has only two types of users Admin (you) and buyers. However if you have mv store you have to worry about third type of users - sellers or vendors. If you can't gain their confidence and trust, there will no products in your store and if you don't have products no buyers. So you have to apply same logic as you would apply to front end home page design to gain confidence and trust of potential buyers.
This is purely a business aspect most software engineers and coders won't get it. They are only focused on features, features and features, i have been in this business too long have seen same mistakes too many times..