I have one setup that gets about 1.5 tok/s of a very large on prem LLM, on a system that lives under my desk. It's used for overnight project review runs and code review that it is fed at the end of each work day. When I look at it the next morning it has done quite a lot of useful work. Dealing with a big slow LLM as an effective tool is really about planning the workflow to feed it.