I’d have to put /etc on another partition, which really means I’d have to up front plan to put every damned writable thing on its own partition, which OpenBSD encourages specifically because it allows you to mount more stuff as r/o. And even then, any partitions which are writable would not be able to be mounted after boot until I do the same ridiculous fsck dance.

But that’s, in my opinion, brain-dead stupid when it only exists to work around the idiocy of not having a journaled file system like ever other modern OS has had for the past 25 years. Having to up-front plan a size (and inevitably get it wrong) for half a dozen partitions, just to work around glaringly obvious weaknesses in the OS itself, is beyond stupid.