NF lets you resume where you left off at. To start from the beginning you must actively select that option
also automatically creates a "continue watching" list. one can also create a "to do list" as well. this is all in the roku app. perhaps it is only in the roku app ? (ROKU was initially created by NF as a way to stream their content when they first began streaming. roku was later spun off as a division of NF. so perhaps these NF things I can do are as a result of using roku? dunno
The bolded is a resounding YES. Roku is a basic version of what Kodi does, except you don't need to buy a box like a Roku or attach anything to your computer to use it. It's the software in your Roku letting you do it. The software can be loaded onto a computer without a box. But Kodi is WAAAAAAAY more mature than Roku in terms of development. Kodi started out as XBMC, which was written to be loaded into a TV tuner box, but because it's open source nobody was interested. It in fact still has the ability to control a TV tuner under the "Live TV" section. XBMC appeared in 2002.