What about latency, disconnects, internal traffic, ... different types of construction materials? Traffic to the internet is not everything. What about self ho

What about latency, disconnects, internal traffic, ... different types of construction materials? Traffic to the internet is not everything. What about self hosting, sharing files between devices, or simply pushing documents to the printer...? I have a small flat, but it has an L shape, reinforced concrete on many walls, an elevator right next to one of them, and so on. With typical setup here ("router next to tv") I would have no WiFi signal in one room at all. Regardless if it's 2.4/5/6. And it's just "a few meters". So two AP's with low signal strength are infinitely better.