This was inevitable and makes sense. While the updates never mattered to me, apart from the Vehicles they are a great source of fun if you've a nice group of friends to play with. The only regret I have is that the GTAO updates ceased to add anything new and significant to SP over the time. Rockstar become too engrossed in trying to make GTAO a standalone and abandoned the GTA V SP. Half of the new updates lack optimization and are put together rather casually. There are server issues, vehicles & boats disappearing, random money awards, cargobob based malfunctions and what not.
TBH, I've given up on GTAO ever since the Snowfall stopped. Rockstar was trying way too hard to push the Consoles and PCs to their limits. The game size is unnecessarily big. And it's not surprising now that they're abandoning it. They'll probably want to make another GTA Installment that has even larger file sizes. It won't matter if the current PC or Console setups wouldn't able to run it. The game will keep falling short. While Rockstar expects us to be hyped, they don't realize how much they've lost due to the lack of focus on a proper single player mode & content (that includes the 3 protagonist) system, lack of optimization and there's probably more.
The above raises concern for the RDR2. It's good that they're chipping in all they can to get it developed, but they're sure to lose the RDR cult/fanbase if they keep making the same mistakes as GTA V. Yes, GTA V did feel challenging but it was hollow at the same time. The frequent changes made it difficult to be enjoyed. Hopefully RDR2 can fill the gaps left by GTA V.