But, as previously posted - we’ve talked about this issue before, OneDrive has a mechanism that allows you to decide exactly where you want files stored on your system using this mechanism. (See also this post and this post in the same thread.)
Obviously this is a solution that Dropbox does not want to support.
And, Maestral allows you to chose where you want your Dropbox files stored. They do this without a kext and without using Apple’s new API, as it lacks the deep integration that DropBox, OneDrive, etc., have in the Finder.
I use the service sync.com as my primary cloud service provider, and it also (at least so far) does not use the API, and allows you to store your files wherever you like.