C3 runtime alpha, new Demonoire RPG demo game, and more.
It depends on the plugin. Simple ones should be easy, and complex ones will be harder. Unfortunately we have no control over third-party developers so it's entirely in their hands. This is one of the disadvantages of using third-party addons: continued support is left with a developer who may not be around in future. In the long term, hopefully everything will settle down and replacements will be found, or features made built-in instead.