I guess that's just something inevitable with this kind of stories that go on for years and years because I understand that these authors are not interested in setting the story in a specific period or specific years but always in the present, so this kind of details become irrelevant, I'm aware of that, but this thing somehow always messes with my head because it's like time passes and doesn't pass at the same time

It's always funny to me when in real life a story has been going on for many years but within the story time is not supposed to pass for the characters, and still temporal inaccuracies occur! Like this manga that has been going on for 18 years, and I realized that in the very first chapters they have flip phones typical of the 2000s while in the more recent chapters they have today's smartphones, but in their universe only a year or two has passed since the story began