As an S8 owner , it would be nice to have this extra feature work , but i didnt buy it for that ,and really it is not like your missing out on ai voice commands , it still has google home on it ,
and you can take a photo by voice command if you wish , this feature you could do on galaxy phones from at least the note 2 (2012 ) and probably some other Android models too.
For me anyway , the bixby thing i really am not fussed about it , and if it didn't eventually bear fruit i couldn't care less.