Nope, its still a fully fledged client, because being a capable client is not /that/ dependant on the UI rendering method, believe it or not.
> but it still has all the disadvantages that you incur when your client is just a web page in a browser.
No? Do you think electron exposes absolutely nothing? There is code being executed with access to the rest of your computer, this has the same access as any other language to the rest of your computer, I mean, hell even if you wanna do something weird, you could write some stuff in C (or use the pythonesque ctypes module), and then run that in turn, once again with access to the rest of your computer.
I could understand these complaints if this was an important critical thing, but its a chat client, its only job is to display text nicely with formatting, browsers are pretty good at that