is it possible to choose a completion engine?

[Tory S. Anderson]

Org currently stands out from my workflow because it does completions its own 
way, with lists and number/letter keys. It would be nice if I could instead 
have the benefit of vertico, or helm, or whatever else instead. Org would even 
benefit from marginalia and embark in some cases. Is there an easy variable I'm 
missing to make org use completing-reads instead of the indexing thing it does?

Thanks!
- Tory