When every program is compiled for a specific architecture, doesn't that enable optimizations otherwise impossible? Of course, two users compiling each program twice for the same architecture is wasteful, but optimizations will save cycles down the line. No?
> but optimizations will save cycles down the line. No?
No. There are not practically enough cycles saved to overcome the often minutes of CPU time to build every update of a large software package.
> When every program is compiled for a specific architecture
Every binary distribution already "compiles" for a specific architecture.
The inane variant "tuning" generally renders miniscule speedups. Even if there is performance to be gained it can be done on a limited case by case basis.
Pretty ironic coming from a distribution that requires every user to compile everything from source.