Godfrey
somewhat colored
The film and digital ISO standards are different enough that external meters often don’t work very well. The shutter lag is a problem. We can always hope for improvements in the M12.
Film and digital camera ISO standards may differ a little bit, but i have been using external meters with digital cameras for years, and never had any problems with exposure as a result. The biggest issue is that it's a little inconvenient to use a separate hand-held meter with a camera designed for quick hand-held use. A little ... Easy enough to do, just a bit inconvenient.
It's worth not over-exaggerating this kind of thing into a big issue.
G