The way I read it, it's not immune, just harder to attack. Furthermore, Meltdown and Spectre are just two specific ways to attempt a whole class of attacks and

The way I read it, it's not immune, just harder to attack. Furthermore, Meltdown and Spectre are just two specific ways to attempt a whole class of attacks and could be improved upon especially now that the whole world's attention has been brought upon it. So yeah probably you're not going to have issues in reality with a G3, especially given its small presence in modern computing, but I wouldn't choose it thinking it's immune either.