Even plugins which were created a year ago can be installed on newer version of Fuel (because of upgrades), so basically only compatibility between plugin and release (openstack release) really matters, probably plugin was not compatible with specific version of openstack release.
I'm not sure if we should show warnings for each plugin on dashboard, there could be a lot of them, I think notification will work here better, lets ask Vitaly K. (UI team), what he thinks about that.
Even plugins which were created a year ago can be installed on newer version of Fuel (because of upgrades), so basically only compatibility between plugin and release (openstack release) really matters, probably plugin was not compatible with specific version of openstack release.
I'm not sure if we should show warnings for each plugin on dashboard, there could be a lot of them, I think notification will work here better, lets ask Vitaly K. (UI team), what he thinks about that.