"Jerry, Jerry, Jerry, Jerry!"
Apparently not. The card will continue to work for this year while negotiations continue for future years. And if for some reason they don't reach an agreement, there still are other ways to access health care. And worst case, they could simply do the same as what non-EU expats (like, ya know, US expats) do. For example, in Spain they could buy the same private health insurance that non-EU expats purchase, and since rents/property in Spain and many other popular expats spots are much cheaper than in the UK, most would still financially come out ahead to stay and buy private health insurance than to move back to the UK. But talking points!
https://www.bbc.com/news/world-europe-44850972
https://www.thisismoney.co.uk/money/pensions/article-7925857/Threat-frozen-state-pensions-lifted-British-expats-EU.html
https://www.thelocal.fr/20200124/what-are-the-healthcare-changes-for-british-people-in-france-after-brexit
Lulz. OK, Pauline Kael
Pro tip: The Cloak Room is not the least bit representative of Surly. The board seems to be a lot more diverse than that, but few people want to get into endless bad faith arguments in an often emo scream room.