Did an install of 1809 (17763.1) couple a weeks ago, now Im wandering will I be able to upgrade to 1903 when it gets released to public? Found a thread, where some of the users claim they werent able to upgrade. Not sure if I understood correctly, but it got me thinking.
Don't worry, some of the users claim always, that they aren't able to upgrade. I have never had such a problem.
Ofcourse, not a problem (but as always, make full backup with dism++, so no matter that happens, you can always restore back, as if nothing happened)