Both sides would be happier in their own countries.
But the talk of secession comes up only by the party that has lost its political power. As long as one party believes it can simply impose its will on the other, you'll never have a reason for both sides to agree on the matter.
The problem now is that because we all acknowledge that our third-world voting process can be used against conservatives in perpetuity, there is no reason at all for liberals to agree to even entertain the idea of secession among states (despite the enthusiasm many of them had for it just four years ago).
After the American Revolution, Tories were forced to leave the country because they knew that reconciliation with those who fought against the Crown was simply impossible; many of them ended up in other British Commonwealths, the most popular one being Canada.
Conservatives in this country are in a similar boat, my friend. While there is no America 2.0 on the horizon (or even to be expected in our lifetimes), I suspect many of us would feel more comfortable in a better-integrated country somewhere else, even as that country may lack the freedoms we take for granted.
I cannot move someplace where I cannot take my guns. That leaves us really with few options.
“But the talk of secession comes up only by the party that has lost its political power.”
Those who fail to learn from history are bound to repeat it! Your example of those in the Revolutionary war is spot on. The same happened after the Civil War. A large contingent of southerners left the country for places all over the world! Mexico and Brazil were probably the most frequent points of escape. Many returned after a few years, but many also stayed. In particular, they remained in Brazil. They founded a city called Americana which exists still to this day.
They were called “Confederados.” You can read about them here: https://bit.ly/3oxwMsq. You can view them here: https://bit.ly/2Xv7HCB. (Warning: This may be disturbing to some — but not all!).
FROM THE LINCOLN PROJECT: https://bit.ly/2LGST0M
“The United States Senate should immediately vote to convict and remove him from office. Any Member of Congress who refuses to do so should be considered a co-conspirator.”
The bottom line is the victors write the history and define the terms of the settlement. It seems we are seeing the beginning of those terms now with “banning” and “lists of Trump supporters.” That’s life.