If we are talking about cloud VMs: sure, their cpu performance is atrocious and io can be horrible. This won't scale to infinity

But if there's the option to run this on a fairly modest dedicated machine, I'd be comfortable that any reasonable solution for pure ingest could scale to five orders of magnitude more data, and still about four orders of magnitude if we need to look at historical data. Of course you could scale well beyond that, but at that point it would be actual work