No matter how good the plugin is, sometimes, due to many reasons, the plugin developer will stop maintaining the plugin with new fixes and updates.
And this makes the plugin incompatible with the current version of WordPress core software.
So, before installing a plugin, always look for the yellow box that says:
“This plugin hasn’t been tested with the latest 3 major releases of WordPress.”
If you find this, it is better to stay away from the plugin and find well-maintained alternatives.
Don’t worry, there are tons of good alternatives for every plugin.
If you want to use the old plugin anyway, try testing it on a staging site.
If everything goes well, then install it on the live website with the caution that it could break your website anytime.