It is a bunch of lawyers playing a can’t lose lottery. They throw basketfuls of darts at multiple targets and collect big for every one that hits a target while costs of threats or filings re miniscule in comparison. In the old days, before judges were men who had taken Critical Legal Studies in Law School these cases would have been disallowed and there would be no payoff. Someone would have to have a real law-based case to get a hearing. Now all the lawyers and judges are graduates of the Crit courses which teach them how to use the Law to destroy society-as-it-is and that it is right to do that. Everything is allowable and because cases are allowed into court in the first place juries believe that they are legitimate cases and treat them as such.
Would they sue the users who use the "record now, read later" options, or maybe they'd instead go after the organizations dedicated to aiding the blind who run sites that reformat internet text so that it's easier to read with that software.
Bet they have already.
The odds are good that even if the lawyers win at court against the blind folks, which is rather the history of this sort of thing, Congress will act to dispose of the problem ~ namely those law firms ~ no matter which party runs the place