I'm not sure why, but most wallets do not have an address feature. Having a one stop shop for all your wallets just make the entire use case easier, and I believe it's that would help attract new crypto users to support the industry and it's movement. An address book like
Digital Names saved me a lot of time to pull up saved files and find the needed address. Oh, and this is not limited to one specific blockchain, so you can have different wallet address like BTC, ETH, STEEM, ETC, and so on...
In other words you are asking to store the wallet information in the cloud? Well this is the worse idea you can have with cryptocurrency. However if someone really feel the need then store then if any online drive but I can assure you that some day someone will find it.
I'm pretty sure everyone has heard of that one person who's device was stolen, or their computer was hacked, stealing wallet addresses, private keys, and even security phrases. Well, that happened to me after someone broke into my hotel room and stole my work laptop. Fortunately, before they could figure out how to withdraw the funds out of my wallets, I was able to extract the funds and send them to entirely new address, but the difficult part of this was remembering the addresses. Storing the addresses seemed unlikely, since other secure information would also be stored in the same location. All I really wanted to was keep an address book to help pay certain vendors and also make deposits into my own accounts.
Well you can just keep a copy or several copy in several safe place instead of keeping everything in a single device. This seems very easy job to do.
Edit: Just visited the address and it seems like you are after promoting the said site.
https://www.digitalnames.io/?utm_source=cc
In this case this is not the right place my man. I advise you to move it to the appropriate section.