I have finally received my reMarkable after waiting since summer, and used it for about a week now. I have used up about half of my first nib, need to charge the paper tablet daily and it has completely replaced my Leuchtturm and Lamy for keeping my daily journal.
My conclusion is that reMarkable team delivers on their promise, to create a true paper tablet. The device delivers better paper and has replaced my Leuchtturm journal. I use more digital paper than I ever used offline paper, I no longer refrain from getting a "dead" copy as a PDF to draw, doodle and ponder upon. It is a reMarkable device, yet with some quirks to overcome, which are all entirely possible with future software updates, which have been promised to come "soon".
Humans tend to be maximizers, so we need to learn the art to optimize instead. We need to learn to get to higher states of conciousness and productivity. To build personal peak performance can be summarized in the saying: "If you expect me to be like you, I will fit in. When you let me be me, I will belong." Schedule your best cognitive work to peak focus hours, reading and reflection to your valleys of rest, and the rest to other parts of the day. Sleep well.