The biggest roadblock to my adopting this as a daily driver at the moment is the lack of secure messenger (e.g., Signal)
https://www.reddit.com/r/PINE64official/comments/jthjkx/signal_messenger_on_postmarketos/
(This isn‘t Pine64’s fault; it’s due to Signal’s policies over which platforms they support and which they don’t.)
Also Dino(XMPP Client) works very well on mobile.