@Mike11 the iphone 11 adopted google pixel 3’s night sight and called it night mode. Therefore low light photos will be far superior to your current 8 plus.
Showing agaisn’t 11 pro but, will be similar low light shot
Pixel 3 when they introduced night sight agains’t Xs
Not the best quality shots but, it gives you an idea of improved low light shots you will get with the 11.