The new hotness right now is dynamic soaring across the heliopause with a solar ion 'wing.'[0] Supposedly this can achieve 2% c, in the same way RC gliders use dynamic soaring to achieve speeds far in excess of the wind speed.[1]

[0] https://www.frontiersin.org/articles/10.3389/frspt.2022.1017...

[1] (headphone warning) https://www.youtube.com/watch?v=4eFD_Wj6dhk