[munk-a]

I disagree - this is just a change in the reader but it cascades into format changes.

I don't know if you've ever had the fun of writing a website using bootstrap and then having a client complain that the page layout changes (i.e. becomes responsive) when the window is resized. I've hit that a few times with things that need to go through audits/agency approvals and in those cases you can pull out some of the @media tags and call it a day.

Imagine having to make sure that liquid mode won't reflow a document that was signed off on by the FDA because there's a concern that the ISI (important safety instructions) box required to occupy 10% of real estate on that page might be shrunk to occupy 5%.

I agree this announcement is a lot less disruptive than the statement initially makes it look, but it's still going to have knock on effects.