Also I wasn't a fan of how every client looked like they were straight from XP. I used this as a way to get familiar with Electron, as well.
Lastly, it's open source so people can add whatever they want to it. I have a few ideas that I would love to be using myself (image previews, in-client file editing, etc), and I'm sure other people have their own features they'd want - and they can add them now.