What potentially catastrophic fate could Mercury face if Jupiter were removed?

Its orbit could become extremely eccentric, leading to collision with the Sun or ejection

Mercury, being the innermost planet, is highly susceptible to gravitational perturbations from the massive gas giants, particularly Jupiter. Simulations modeling a Jupiter-less solar system suggest that Mercury's orbit would destabilize severely. This lack of gravitational regulation from the giant planet could cause Mercury's path to become extremely eccentric (non-circular). Extreme eccentricity would likely result in one of two outcomes: Mercury plunging directly into the Sun or being ejected entirely from the gravitational boundaries of the solar system, illustrating Jupiter's role in keeping the entire inner neighborhood gravitationally tidy.