Yesterday on Dec 10 2018, NASA announced that Voyager 2 probe has exited the heliosphere - the protective bubble of particles and magnetic fields created by the Sun and entered the interstellar-medium; while Voyager 1 reached the milestone back in 2012.
With Voyager 2 has better and more science instruments, however; assume it travels at a higher speed than its current speed (17km/s) and make it to the Oort cloud before the RTGs decayed (still contactable), is it capable of proving or maybe study the Oort cloud?
The Oort cloud named after the Dutch astronomer Jan Oort, sometimes called the Öpik–Oort cloud, is a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from 2,000 to 200,000 AU (0.0 to 3.2 ly).
In future exploration, it states the Voyager probes will reach the Oort cloud in about 300 years and it will take about 30,000 years to pass through it. As they are still far far away from reaching the starting point of Oort cloud, are the Voyager probes still considered within The Solar System?