Unless civet's compiled output is hard to read you could always just check in the compiled Typescript source and continue from there if it gets abandoned. Not much of a risk when the migration is built in by the way the tool works in normal use.
There's plenty to criticize about Protonmail but this article is sensationalist bullshit. I'm surprised the HN population is letting itself be goaded like this.
I'd like to posit that getting rewarded for forwarding traffic in combination with the lack of maintenance over the node list makes Sybil attacks on this network the default instead of just a concern.