On my 2 years old ThinkPad laptop SSD is faster than lz4. On a fat EC2 server lz4 is faster. So one really has to test a particular config.
It still bothers me that the fastest most performant computer I have access to is almost always my laptop, and that by a considerable margin.
Someone should do some lz4 vs. ssd benchmarks across hardware to make my argument more solid and the boundaries clear.
But yes on the extreme end absolutely there's a point where lz4 stops making sense, but also most of us aren't trying to max out a 128 core postgres server or whatever.