Intellitrace and TTD take different approaches and have very different trade offs. Intellitrace allows imposing logging on a system posthoc. TTD records everything the system does. They are not merely labeled differently they are different in kind. The consequences of those trade offs make the pragmatic use cases very different. Intellitrace was always intended to head toward logging in production systems, which i believe it has achieved now. It’s unlikely you would TTD a server in production without a very good reason. It is possible for a Intellitrace log to not have enough information to debug a problem. A TTD trace has fundamentally captured everything, its bigger, a bit more unwieldy... but in a deeper sense it is complete.