Plenty of writers use the reMarkable. If you prefer typing text for your first draft you do it in new documents on the device and then you can copy the text from the PC rM app, once downloaded onto your PC, and paste it into Scrivener or Word, or wherever you like to edit. Be aware that the width of the page you’re typing on feels narrow but you can keep typing on one infinite page. I hand write my brainstorming notes then my first drafts, then type up my chapters in separate note documents so they don’t get too big to copy paste. The documents all go in a folder with the title and I load research/article pdfs from my Mac into the same folder, so it almost feels like Scrivener. There is even a scene cards template you can use. It works brilliantly as a distraction free typing device and so much more.
No pen eraser works on rM1 without a hack and as they’re becoming rarer you would have to dig back some way on this forum to find it and it maybe out of date because of more recent updates. I’ve always used the eraser option in the menu at the side, on my rM1, and it becomes automatic very quickly. It’s actually quicker to lasso and erase that way then swivel your pen to rub out manually, once you’re practiced at it. I have a Boox tablet as well so I’m used to both.