It has been found out that using different tech on same frequency spectrum won't give you more bandwidth. And using higher frequency with more bandwidth (The ultra wideband - UWB - 5G running on 10GHz+) has a nasty problem with attenuation and effectively any solid object is becoming a steel wall for such 5G signal, including glass in windows or leaves on trees.

After sales realizing that attenuation is a real thing, marketing started pushing 5G mini BTS which you will put into every room or office. People obviously started pointing on their Wi-Fi routers asking why they need mini BTS.

5G has been grossly oversold in what it can do and drawbacks (like hideously unstable 5G UWB connection when you are not standing still) has been kind of omitted.