> the basic technology for "much faster speed" doesn't exist.

…but we’re very close. The next technique will be flying near the sun then deploying a solar sail for a huge speed boost. Voyager goes 3 AU/yr, solar sail boost with todays technology will enable 7-9 AU/yr.

Highly recommend watching Slava Turyshev discuss his work on an SGL telescope, which employs this technique.

https://www.youtube.com/live/lqzJewjZUkk?si=57VS4oqbaKEXmyOR