@ Rob, WiFi 6 can help solve your problem under the following conditions:
1) Both your AP and client devices support 6GHz
2) Your AP and client devices support WiFi 6 but not 6GHz, and most of your neighbors' APs and client devices also support WiFi 6

In the case of #1, you don't have to compete with your neighbors on the crowded 2.4 and 5GHz bands. In the case of #2, a WiFi 6 feature called BSS Coloring will allow you to share the same 2.4 and 5GHz channels with your neighbors without stomping on each other (to a certain degree :-)