I haven't read through all the pages of this conversation, so forgive me if someone's already made this point...
Lots of people seem worried about the worst-case scenario, which is that the 2019 pick ends up being the Sixers' first rounder, with the Sixers by that time being a playoff team.
Keep in mind that in order for that to happen, the Lakers have to land the #1 pick next year, and then the Kings would have to land the #1 pick the following year.
Even assuming the Lakers and Kings are the worst teams in the league in those respective years, keep in mind that the worst team in the league still has just 1-in-4 odds of landing #1. That means that the odds of the Lakers and Kings landing #1 in back-to-back years are, at the very best, 1-in-16.
In other words, don't worry about this scenario. I'd be more worried that the Lakers are somehow good enough such that their pick ends up #6 or higher next year, followed by (somehow) Sacramento and Philly both somehow being "good" in 2018-19. But that's pretty improbable too.