Why not speakon?

Hi is there any home audio brands that would offer speakon out of amp and in to speakers connectors?
Why most most of home audio equipment isn't designed for speakon? What is the disadvantage to bananas, spades or bare wire?
IMO, the reason that the current 5 way binding posts are so popular in audio brands is that it gives total flexibility for the owner to use the connection they feel is best.
Adding a versatility to the equipment, I guess should not hurt, because there are pro audio models that would offer both 5-way posts and speakon.