Actually, this one is a good counter-example. In 2020, when the feature request was made, all Bitwarden apps and extensions displayed credit card numbers without spacing (1111222233334444). Bitwarden began developing the requested feature in 2021, and released it for the Desktop app, Web Vault, and browser extensions in 2022. That’s a good example of being responsive to community feature requests!
Only the mobile apps remain without the requested feature, which is why the feature request thread was re-opened. The mobile apps have recently been completely rewritten from scratch, with the new “native” versions released in 2024, which is one contributing factor to why some features are not yet fully available in the mobile apps.
Do you really feel qualified to opine whether a specific feature request would be “simple to implement” or not? I think that such assessments should best be left to actual developers.