Based on microsoft/winget-pkgs#271696.
During an attempt of mine to have a tag tally for the Microsoft.PowerToys manifest reach to almost 30, I hit an error during PR pipelining that said the max number of allowed tags was 16; and https://github.com/microsoft/winget-cli/blob/master/schemas/JSON/manifests/v1.10.0/manifest.defaultLocale.1.10.0.json#L206-L214 seems to confirm that.
So simply out of curiosity: How was the exact number of 16 landed on? Were there any specific reasons?