Semi-major axis vs. eccentricity of observed exoplanets. The data is obtained from Data from Data & Analysis Center for Exoplanets (DACE) in April 2024. Here, we include exoplanets heavier than Neptune, with a measurement uncertainty of less than 20 % in eccentricity. The grey dashed lines show the boundary of the regions where planets could be tidally disrupted (q_p < 0.01 au) and where tidal forces with the central star are sufficient to cause inward planetary migration (q_p < 0. 05 au).