searching for filesystem=home or host is not accurate as many packages have ro or only subdirs access to the filesystem. You can also often use portals to replace the filesystem=host/home permission.
Using filesystem=home:ro could make the application cannot write to .bashrc and others directory, therefore they are STILL not used widely. The package you mentioned isn't on the list of commonly used packages.
searching for filesystem=home or host is not accurate as many packages have ro or only subdirs access to the filesystem. You can also often use portals to replace the filesystem=host/home permission.