Files - Move to "Add a tab" dialogue
Instead of having the Files tab hardwired to each channel, allow the user to remove the default Files tab and add named file tabs pointing to specific folders within a SharePoint document library. This would enable the user to rename the SharePoint library folder and re-add the file tab to another named library folder (existing request) as well as add additional focused file tabs to the channel for specific folders.
Thierry Dalon commented
Other reason for making the Files Tab removable: you might prefer to embed the document library as website because you want to open files directly in the client application and not in the Teams preview mode.