Even if intelligence scaling stays equal, you'll lose out on speed. A sota model pumping 200 tk/s is going to be impossible to ignore with a 4 year old laptop choking itself at 3 tk/s.
Even still, right now is when the first gen of pure LLM focused design chipsets are getting into data centers.
At a certain point, tokens per second stop mattering because the time to review stays constant. Whether it shits out 200 tokens a second versus 20, it doesn't much matter if you need to review the code that does come out.