Reading comprehension is a wonderful thing. Its literally explained in chapter one. People with abilities age slower, with Life magic specifically, they can practically stop aging. The female knight? explains this.How did he spend 25 years training and not age a single day from the looks of it? Hell, not even a single person around him looks like they aged a single day. Does the castle have some type of anti-aging magic on it while people are inside training so the gods can build people up?
Or is the life magic something that basically stops the aging process entirely? Or, most likely, the author has no idea what to do with the story already and decided to say how he's only the third person to become an adept after twenty five years of being summoned in the group to show how important he is.
Big ass world, can tank a coal power plant or twenty. Also they could probably use magic to capture carbon.You want the convenience of modern technology on Earth? Then you also get the inconvenience: pollution-nya!
They could also use a paradox/simcity fan.You would think that after summoning this many people, they'd eventually end up with an autist who's obsessed with trains or tanks
I'm morbidly curious where the author is going with this. Is it going to be super cringy and shitty or have something to say? Only time will tell.