Tangential to the comment above… I just watched the deleted scenes and making of documentary on THE LAST JEDI blu ray.

The number of stunning practical creatures created for the Canto Bight sequence is incredible, and it seems only around half of these marvellous creations are actually shown in the finished movie.

And yet… the on-screen Canto Bight sequence does heavily feature a CGI leprechaun character putting the coins into BB-8. It’s shockingly fake, and never remotely convinces as belonging to the tangible environment we see around it.

So what was a problem in 2004 - whether George admitted it or not - remains a problem even in 2018.