Yes, that’s exactly what has been requested for many years (and also in the linked thread). But until that is implemented, if ever, both the .cpr and .bak files are stored in the same folder. This makes it hard to find the .cpr needle in the .bak haystack. That is how things currently stand. Within that existing environment using the grouping features in the OS improves the ability to visually separate the two types of files. Or folks can continue looking for needles in haystacks if they prefer.
The topic of backups always seems to generate some confusion in these forums because the word "backup’ is used in two similar but unrelated contexts. One is the periodic automatic saving of the Project as a .bak file. The other context is when using the Backup Project feature, which is more like ‘create a brand new project based on this one’ than a true backup where you archive something that you can restore later if needed. This last kind of true backup is best done at the OS level using system backup tools.