Beware of talk about benefits without mention of drawbacks.
Connecting grids could significantly increase the fragility of the system resulting in higher risk of large-scale power outages. Some of you might have experienced the 2003 blackout in northeast North American (https://en.wikipedia.org/wiki/Northeast_blackout_of_2003), which luckily happened in the summer. Tail risks should not be swept under the rug.
Even a single widespread event could completely wipe out the benefit gained from connecting grids.
Connecting grids could significantly increase the fragility of the system resulting in higher risk of large-scale power outages. Some of you might have experienced the 2003 blackout in northeast North American (https://en.wikipedia.org/wiki/Northeast_blackout_of_2003), which luckily happened in the summer. Tail risks should not be swept under the rug.
Even a single widespread event could completely wipe out the benefit gained from connecting grids.