I can forgive a world being stagnate because similar to our world, the medieval era spanned roughly around 1,000 years from 400 to 1400 AD. Buildings included were made to last for a very long time, (reminder that we still have buildings here today from the ancient era). What bothers me the most is how come nobody double checked the remains of our MC? or find her lost items? Or why they left the room as it once was? Even more confusing, is how is her bag still intact? Considering she fell into this world's equivalent to an incinerator but with magic, you'd think her bag would just you know... Burnt to ashes the moment she jumped in.