I think, unlike what the author writes, communities CAN be moved if they are sufficiently small and loyal to the leaders who do the move, and the leaders don't screw it up. Moreover, the move is sometimes an improvement.

I've witnessed it myself. For example, Commander Keen fans moving from various InsideTheWeb forums to a centralized phpBB following the ITW shutdown announcement in the late 1990s. I can't think of anybody that got lost, and it was actually an improvement because the new discussion infrastructure was better than it had been before. The community didn't scatter to the winds, far from it; it consolidated and grew.

Of course, such a situation is probably rarer with the enshittification these days, but it would be worth it to figure out when it works, too.

And history is replete with stories of groups who became most successful AFTER a migration, or at least were not so negatively affected by one.

Digg to Reddit was a positive migration. I can think of many small Reddit communities that couldn’t have flourished under Digg or the old phpBB style boards.

Things can get better over time. When they don’t acknowledge this I can’t help but see the authors article as a dislike for any change of any kind.