I just received a notice that dropbox will cease support for OS 10.10 and 10.11.
The notice, giving it the most leeway i can, indicated that i should consider upgrading my OS or use a web browser. This is not always possible.
For many of us, we are at the end of the line re: OS upgrades. I have an old macbook pro that i use for a few light tasks - but the data must be available on others machines. I use dropbox for this. I also cannot use the web browser unless i wish to upload files with each change. Impractical.
I will likely wind up switching to a different cloud service, which i would prefer not to do - yet maybe i must.
I don't know why you are ending support. The clients exist already and are unlikely to require many changes, if any. Please reconsider.
--justmeinNJ