We use sampling for the cases where this level of detail is needed as it has lower overhead.
What use case did you find this useful for?
You do need to allocate a ton of memory for the recording buffer to record sizable amounts of trace data. GB per core-second of trace or so (ring buffer so you get to see the last N seconds, not you need to run for less than N seconds) but that is fine during development on normal dev machines.
It is useful for everything. Why would you not want full traces for everything? It is amazing. We use it for everything internally where I work. Or rather, it is part of it. We actually prefer full time travel debugging during development and automated testing (again, overhead is low enough) but it is not available for everything. So sometimes we are stuck with just traces.