Plenty of x4 games have borders but most of them, Its only for show, like you colonize a star system and you get a nice "insert colour here" around it but dont really makes any difference.
Take Distant Worlds for an example, when you colonize a star system you get a border that can contain a starsystem or two, when your colony grows so does the border and you get several starsystems within in your border that other Empires cant colonise due to they are within your borders.
Same as that old somewhat flopped Star Trek x4 game called Birth of Federation, I kinda enjoyed that border feature when two Empires started to collide then border will turn into a DMZ beacuse both Empires want to claim those sectors but cant colonise due to DMZ so either they go to war over it or buy the rights to exploit those sectors.
I would really love to see these kind of features in Stellaris.
Take Distant Worlds for an example, when you colonize a star system you get a border that can contain a starsystem or two, when your colony grows so does the border and you get several starsystems within in your border that other Empires cant colonise due to they are within your borders.
Same as that old somewhat flopped Star Trek x4 game called Birth of Federation, I kinda enjoyed that border feature when two Empires started to collide then border will turn into a DMZ beacuse both Empires want to claim those sectors but cant colonise due to DMZ so either they go to war over it or buy the rights to exploit those sectors.
I would really love to see these kind of features in Stellaris.