I found your description of applying effort to a really difficult task, and eventually making the hard decision to cut your losses, inspiring and moving. Thank you to CEAP’s founders, funders, and other supporters.

I think high X-risk makes working on X-risk more valuable only if you believe that you can have a durable effect on the level of X-risk - here's MacAskill talking about the hinge-of-history hypothesis (which is closely related to the 'time of perils' hypothesis):

Or perhaps extinction risk is high, but will stay high indefinitely, in which case in expectation we do not have a very long future ahead of us, and the grounds for thinking that extinction risk reduction is of enormous value fall away.

If you're attending the Leaders Forum or are a 'key figure in EA', you're probably an EA, even if you don't admit it to yourself.

How much of this advice is generally applicable outside the US?

Many of the questions ask you to pick among 'Strongly disagree' through 'Strongly agree' and most questions are optional. For those likert/select-an-option questions, I guess the survey analysers would do more aggregation among survey-takers, so quantity would matter there.

For context, Kirsten has long worked for UK government departments.

No. It just has a question ‘Where are you based in the UK?’, with an option to say ‘not UK-based’ and specify where you are.