[@Andromedai]

Oh yeah, the Salarian Council position would've changed hands quite a few times between the end of the Invasion and now.  Salarians live a realistic maximum of 40 years.

Liara wouldn't be a Matriarch, that stage of life begins around 700.  She's gonna be around 260 so she's still deep in her Maiden phase.

Also who else is still alive?  Namely Wrex, Grunt, Bakara, any other significant Krogan or Asari.  If medicine's advanced significantly, James and Garrus maybe.