The most commonly advertised purpose is postal addressing, so you’d want precision over privacy. If I understand the maths correctly, it would require a 12-character string to achieve comparable accuracy. If we’re being honest, can we really say that a string of 12 random alphanumerics is more memorable as a postal address than 3 words? Is it easier to tell somebody, or write on a form? Can I read it correctly from that form, given that it doesn’t appear to remove visually-ambiguous pairs (1/L, O/0, etc)? Can an untrained person who doesn’t know a phonetic alphabet by heart read it accurately over a poor-quality phone call?

For most of the use cases I’ve seen pitched, OLC would be “in all respects superior” to Maidenhead. Again, though, you’ve got to ask, what are you trying to do with it?