This. Create "MySSID 5" and "MySSID 2.4" (or however), and then rank the two in priority order, 5 over 2.4. Then the OS will prefer the (usually less crowded, but shorter range) 5GHz network and fall back as needed.
I used to have the two on the same SSID, but I found my adapters (or the OS) would gain an 'affinity' for 2.4 as the stronger signal and never use 5.
I used to have the two on the same SSID, but I found my adapters (or the OS) would gain an 'affinity' for 2.4 as the stronger signal and never use 5.