I've tried it, I wanted to love it, but man was the self-hosted sync engine a pain in the ass. Seemed like this was a totally second-class offering from Nylas,

I've tried it, I wanted to love it, but man was the self-hosted sync engine a pain in the ass. Seemed like this was a totally second-class offering from Nylas, there were several known bugs where the client had problems syncing with self-hosted engines and the response was seemingly "we know this is a problem with self-hosted sync engines, we'll try to fix it eventually". A fair enough response to me as a nonpaying user who didn't want their cloud offering, but certainly enough to get me to stop using their open source offerings as my email client.