In reply to Antony Smith.

you’re losing site of the needs of a large, possibly hidden, segment of your user base. We’re the guys that never install jetpack and don’t connect the store to woocommerce.

This is the crux of the issue. For example, there's no satisfactory way to replicate a box full of meta fields in Gutenberg, yet. The fact that a popular plugin such as WooCommerce is still using the old classic editor UI is very telling. They are so focused on pleasing the regular Joes and Janes who have a simple blog that they are forgetting the needs of a very big part of the community.