The problem for UK expats is that all except the most recent moved abroad and made major life decisions, never imagining that their EU rights would be removed.
Totally different to non-EEA expats, who knew from the start that they didn't have the rights of EU citizens and hence put in place all they needed.
I suspect they also learn the language ....
Embarassing, but I've recently come across a Brit who has been here 26 years - and hasn't learned German 
When he applies to continue residence after Brexit, he'll need to hope the German Foreigners office have English forms and people who can speak English, or take a German speaker with him
I wonder how many other Brits in the 27 countries, have this problem
British in Europe - Autumn newsletter:
https://mailchi.mp/5cf6ceb55972/newsletter090919?fbclid=IwAR3kZC8oMKoD731RDvXNxpwLE28sm4BVirui2vC1fUS6e2eh6wxCkkfvQjQ
We will point out in Brussels, London and in member states that Britons in Europe face a huge loss of rights as we transition from EU citizenship to third-country-national status,
with little scope for oversight from the European Commission.
We will explain how, with No Deal, we will be under twenty-seven different legal systems and contingency plans, many of which are sketchy or depend on reciprocity from the UK.
In parallel, we will continue lobbying HMG
for lifelong pension uprating, for home university fees,
for a long-term commitment to support S1 healthcare and social security coordination
and for the right of Britons to return to the UK with their family members.