Good news is, once you update - the Recovery Drive will also update to 1809, so if you have to reset your machine, you won't need to update to 1809 each time. I have been using Windows since Windows 1.o mid 1985. (Man I am old) and I have stuck with it. I am here to tell you, Microsoft has really done well with Windows 10 Pro. Super stable, reliable system.
I recently started with the Windows Pro/Surface Book devices with the SP4 as my very first. I had to get a refurbished SP4 due to a screen issue, but other than that little hiccup - I am very happy with both my SP4 and my SB2 (i7, 1TB) beast of a machine. I recently downloaded Assassin's Creed Odyssey and cranked up the video settings - it played flawlessly for hours on my 75 Inch LG Television. I have nothing but good things to say about the Surface Book 2 - What a beast of a machine. Enjoy!