The "glitch" was decades of deferred maintenance that left sensors inoperable along the line. Theoretically now that the SafeTrack initiative is complete they should be able to return to semi-autonomous operation, but I doubt it.
I'm not expecting the DC Metro to go autonomous anytime soon either. It's a huge jobs program for inner city residents. Basically a commuter tax for a social program.
The DC Metro used to have a semi-autonomous mode that's been turned off for years since there was a glitch that caused a crash.