[twoquestions]

You just described Numenera, if you've never read/played it I'd highly recommend giving it a shot!

It takes place billions of years in the future in what it calls the "9th World", when some mysterious beings just went away.

[A_D_E_P_T]

Never heard of it, but will definitely give it a shot. At this point I'd read the books only to learn more about the setting. Thank you.

[crooked-v]

For an anti-recommendation, my experience with it is that the setting is interesting, but the system is just a weirdly boring-yet-fiddly derivative of D&D-alikes that doesn't touch on even a fraction of the narrative potential of the setting.

[tormeh]

The Cypher system is definitively kinda shit. It’s easier to DM in some ways, but it’s just very unrefined, and badly in need of a 2nd edition subject to more playtesting.