To some extend priority boarding is only a real perk on the shorter / high density flights and/or when travelling l/h at the back.

L/h J or F has a lot of space to store things so apart from not liking to shuffle forward in a queue, it doesn't really matter when I board. Less time on the a/c before a long flight isn't a bad thing and especially on the UD, no-one struggles with hand luggage.

Agree though it is an issue for the domestics and others where cabin luggage space is limited.