One of the things LNG has over coal is that it's very easy to turn off and on in case cheaper sources aren't producing enough. LNG plays much better with renewables and coal also produces ton of pollution and particulate matter. It's the lesser of two evils when there are no methane leaks.

Methane leaks will still punch the climate in the gut so any leaks are unacceptable and all methane gas needs to be accounted for.

Both obviously need to be replaced with renewables and large cost efficient energy storage. Hydrogen is attractive since energy doesn't degrade over time, pumped hydro for weekly to monthly high quantity and power, flywheels/lithium batteries to stabilise the grid frequency, heat storage with district heating for households and redux flow batteries with massive containers for winter/summer differences.