It’s stable for Assad and Iran’s mullahs. It’s not good for the USA’s interests, nor the interests of Israel and Saudi Arabia, both of whom would be in danger from attack by Iran and/or Russia, since they would have Syria as a launch point for such an attack. And it’s certainly not good for the vast majority of Syrians, who have chafed under the oppressive rule of the Assads for the last 45 years. They, and the US, Israel and Saudi Arabia are better off with any group, even ISIS, running Syria rather than the present regime, which is just an Iranian/Russian sock puppet at this point. Besides, Iran has yet to receive comeuppance for the hostage crisis. Karma can’t wait forever.
The Putinista creeps among us know all this already. They are either getting paid by someone to continually push Putin's various agendas, too stupid and/or ignorant to even know what they're talking about, or just simply out of their friggin minds.