I hope no one will be naive enough to expect Dropbox to keep file sharing the same for the foreseeable future.
You could honestly say this about any free hosting site. My post was simply clarifying that this doesn't affect non-Public folder shared links (which I have always used). Whether or not this gets changed in the future is unknown. The already dropped live HTML linking support prior to this so they're clearly cutting back on direct public links.
The only way to be in control of a host is to run your own tbh.
You are correct, but I would point out that I was a paid subscriber. When you are receiving something for free, it's hard to complain when it gets broken.
When you are paying for something, things change quite a bit. Obviously my hobby forum images are not that important, but at work if we paid a company for a certain feature, and invested in training, workflow, APIs, etc., and then the company mothballed it (and then refused to even grant legacy access), there's no way we would continue to work with them.
For example, Bitcasa did something similar to its non-commercial customers (including me) in 2014. When its corporate clients saw this, they gradually started moving to other providers. They've been on a downward spiral for the last two years, and there are now rumors they are shutting their doors.