For a huge generation of people, Ewan’s version of Obi-wan was the epitome of what it meant to be a Jedi. Originally played by Sir Alec Guinness in the original trilogy of movies, Kenobi was the last survivor of the Jedi massacres that led to the rise of the empire. When episodes 1, 2, and, 3 appeared McGregor played a younger version of the character and we saw him grow with Kenobi and embody him in a way that Guinness perhaps couldn’t. McGregor’s Obi-Wan was a dashing, charismatic hero, with a lot of physicality played into the role.
Article source: https://www.technobuffalo.com/disney-will-see-ewan-mcgregor-return-obi-wan-kenobi