It's also one of those few isekai series where old knowledge matters a fair bit, struggling to make use of such with varied results,
and sometimes managing something thanks to old knowledge while sometimes doing something wrong because of it.
If you look at alot of isekai stories, past world relevance ranges from none in some to minor in others, and some cases it's actually somewhat relevant..
But frankly it's rarely ever made a core part of the story, usually just remain in the background as a setting that affects choices at times.
This story wouldn't really work without the isekai setting, because it's making proper use of it.