In southern Spain you can’t dig without hitting some stone age stuff. My town was a known stop for travellers before the Romans took over because of fresh water wells. Eventually a roman road was built about two millenia ago, and still ride on it with my bike for some routes.
No old buildings remain, this was a roadside village and stuff was made cheap and not meant to last, but there is a funeral arrangement from 600 BC that was unearthed and sent to the national museum. More info
That just means that they haven’t done enough “cost cutting” and “profit optimization” yet. Eventually they will get there.