The law doesn't specify what you get when you turn off the recommendations, largely because there are too many possibilities and it can't adequately define a solution over all products. The net result is companies will likely comply to the minimum extent possible allowing you to turn off your algorithmic feed by turning off your feed entirely. Many products will be useless without this feed so consumers will opt into turning it back on and nothing will change.
For example, with facebook, a good user experience would be turning off the algorithmic feed results in a purely temporal one with all your existing filters in place. I highly doubt facebook is going to reimplement a temporal feed to give people a viable option for turning off the feed they want them to use.
So my prediction is nothing will change because the algorithms disabled option will intentionally be a very poor experience designed to make you immediately turn the algorithms back on.
For example, with facebook, a good user experience would be turning off the algorithmic feed results in a purely temporal one with all your existing filters in place. I highly doubt facebook is going to reimplement a temporal feed to give people a viable option for turning off the feed they want them to use.
So my prediction is nothing will change because the algorithms disabled option will intentionally be a very poor experience designed to make you immediately turn the algorithms back on.