Assuming Aaron Donald and McVay return, there is no reason they cannot remain competitive. They can restructure contracts and leverage future cap space (of which they have plenty) to both retain and attract talent in the free agency market. Robert Woods should return to supplement their WR pool.
Now, they aren't particularly deep at skill positions, but any team has attrition fears. Like someone else said, their OL is aging out and leaving so that's a concern, but not insurmountable.
The Rams proved that there was a market over-value of draft picks to manage cap space. They decided better to use premium draft picks to procure PROVEN players and pay the cap premium than to risk busts/duds. I think they'll be similarly competitive as they have been the last few years, but they wouldn't be my first bet to win. I don't think they are a juggernaut.