It’s now called Stoat Chat due to copyright reasons. It doesn’t have as poverful server management as DC or bots but a solid option if you can get your frineds to use it. I think you are thinking of the wrong thing regarding servers, you don’t need any hardware for one it’s like discord, the server exsists on the service servers. It’s like you just create one and use it for free. VC should be fine nowdays idk about screensharing never tested it but it should work. It is easier than DC due to it having less features.
Maybe rocket.chat but it’s aimed at business so idk