There seems to be some confusion about the additions which have been made to Proton's dispute resolution clauses, so we'll share some further information (with the usual disclaimer that this is not legal advice).
-Proton's updated ToS does not change dispute resolution for users outside of the US.
-For US users, Proton's updated ToS also does not remove your existing right to bring a claim against Proton in Swiss court (so you are not forced into arbitration).
-Recognizing that some US users might not want to bring a claim in Switzerland, our updated ToS adds the possibility to arbitrate in the US.
-We are wary of US courts having jurisdiction over Proton as it gives the US govt leverage. We suspect many of you are too, which is why people care about Proton being Swiss. Therefore, while Proton agrees to permit arbitration in the US, we don't by default permit proceedings in US court.
-US users don't need to opt-out to preserve your right to have your claim settled in a Swiss court.
-And for non-US users (which are the majority of Proton users), there's no material change here compared to the previous ToS.
