I don't know, I followed the thread and it didn't seem conclusive, esp with the main criticizer stating "OTOH, it's a neat example of a fixed precision integer type"

I use it a lot, and yes, it is missing some casts but you can cast to decimal and go from there:

select '42.00'::money::decimal;

I've also used stripe, and maybe it's a javascript thing, but they represent all their money in cents. Personally, I'd rather use the money type, it is easy for me to reason about.