It isn't, people just like to worry and be dramatic. The league was "dying" in S18 too. And the website actually LITERALLY died once (in the mid to late 20s maybe? Early 30s?) and that put us in a tough spot. It probably would have KO'd most other sim leagues dead. But everyone rallied and basically rebuilt a new site from the ground up within a week, and we barely missed a beat.
So no, we're not dying, nor will we ever really be close unless everyone collectively decides they want to stop. Which after nine years, I'm not so sure that will happen.
Could we be doing better? Sure. We've got a lot of veteran members, and could always use awesome active new guys like yourself and Scooter. We could use you 5x over. But at the end of the day, most the members here are too determined/stubborn to die, regardless of the circumstances.