SFTPCloud is working on WebDAV
https://feedback.sftpcloud.io/roadmap

We explained a lot of times what happened with WebDAV. Also, if you take the time and search through the past comments, you will see many of the questions were already answered multiple times. We try to use the time to grow the platform, not to answer the same thing 3 times but let's answer again: further development is driven by growth (mostly enterprise customers).

I already explained to you in another comment that running the platform is not as easy as you think (the one where you accused us of doing nothing and where you didn't answer back) and that there are updates, but probably you say things only based on the not used anymore changelog, not based on actually using the platform.