It’s possible, of course, that Kylo Ren was simply lying and manipulating Rey, but I always found his offer fascinating: while the various Star Wars films and related media portrayed the Sith as unfeeling monsters, the Jedi are presented as bored, myopic authoritarians.
Cranky Luke Skywalker was frankly right about the incompetence of the Jedi Order, and if he had actually seen it through, Kylo Ren’s idea about forgetting the past and introducing a new kind of Force user to the galaxy could have been just the shakeup this tired franchise really needed.