Why do we not allow arbitrary client side feature sets?

I noticed that Vaultwarden does not support CXP (credential exchange protocol) for import/export, and sent out for adding the client side feature flags.
During the investigation, I noticed that there are many Bitwarden feature flags that are not available on vaultwarden. Most of the feature flags seem to require nothing but pass a map entry of key:"true" in the api config.
I'm wondering, as a popular self-hosting solution, is there a reason we don't allow arbitrary "unchecked" feature flags? This seems to cover many cases of new feature flags.
Thanks.