Interesting… I have been using RealBasic/Studio/Xojo since 2006, and I just looked… and the only files that exist are for my current version of Xojo… not sure how or what may have cleaned it up… .or when for that matter.
It’s weird. I checked two other machines I used to use and are now onto better pastures and they also had the files.
I’m obviously not complaining, I don’t mind it much, but it was surprising. And if you don’t have them then more so.
This might just be Mac OS and the Unix underneath. Modification dates for directories change if the contents change at all.
The Finder creates and updates invisible files within folder when you open those folders.
Modification dates of files are very reliable but for directories there are many caveats. For example, if you haven’t “viewed” that folder ever before then it’ll create some files to store metadata (what used to exist in resource forks pre-macos) and if you haven’t accessed a folder in the Finder in a few years it usually will update the folder’s metada with things that have changed over the years in how it’s handled.