The stated reason is the same as Nick’s: since the FTX collapse he’s been reused from too much board business for staying on the board to make sense:
Since last November, I’ve been recused from the board on all matters associated with FTX and related topics, which has ended up being a large proportion of board business. (This is because the recusal affected not just decisions that were directly related to the collapse of FTX, but also many other decisions for which the way EV UK has been affected by the collapse of FTX was important context.) I know I initially said that I’d wait for there to be more capacity, but trustee recruitment has moved more slowly than I’d anticipated, and with the ongoing recusal I didn’t expect to add much capacity for the foreseeable future, so it felt like a natural time to step down.
I downvoted this comment, even though I’m pretty sympathetic to many of the factual claims it contains: in particular, I don’t believe that Israeli civilian or military leadership are doing everything they can to avoid civilian casualties. Nevertheless, this comment feels quite out-of-place and vaguely inappropriate to me, given the framing and emotional tone of the OP, which feels much more about explaining one person’s feelings and thought processes than an actual attempt to make a strong argument for a specific position.
I also think it’s needlessly hostile, in a place where compassion and acknowledgement of uncertainty seem particularly important. Calling someone’s views “propaganda talking points” seems like a bad way to start any productive dialogue.