In the register you can set PO to automatically join servers when it first starts up, like auto-join channel.
If you would want to bombard your processor with that much and just generally not make the effort to manually join the server, you can, but otherwise I don't see much use in this. That's just me tho, with my potato computer.
also kinda seems pointless for a couple of clicks plus if you wanted to join a different server it would be a longer process then just clicking it in the main menu
I don't see how can this be a practical function anyways. It doesn't take anyone more than 5 seconds to double click on any server in the server registry (Being generic and not specifying PO server itself). Also, it would consume a lot of RAM memory starting up the program and joining the server right away.
Yeah we need that Random Access Memory memory but it really would put a strain on your comp and most people dont join more than 2 servers max, whereas we're in upwards of 10 channels in some cases, and they're not as easily joined :0
You could always just download some more RAM though. There would be a problem if the server IP changed since you'd no longer be able to connect with the old one, it would attempt to join a server that doesn't exist, wasting computer resources as well. If your net is down too, it would be joining servers and not show you that you didn't connect to the registry. It would also probably take more time to code and implement than it would for everyone combined to just spend the extra 2 seconds to click to join a server.