Tbh I never use stock keyboard on any of my android devices. As far as I can remember I've been using SwiftKey the longest and it has been my go to from day one that I must do whenever I get a new android phone.
Though I'm not sure if Samsung stock keyboard is any better but based on the complaints lately I have no issues with SwiftKey or Google keyboard.
Feel free to drop ur thought any pro and cons using stock or why u don't use 3rd party keyboard😌✌️
It depends on the user. If u like then it's fine. Samsung its okey just not use to it. I tried, not sure the haptic or what just I'm not feeling it. Even apple ones feel better tbh. Just my 2 cents😅