Both dh and I are classed as key workers.
However we have never used it to get any benefits or too our advantage at all.
We are both working hard, long days and just as busy, if to more so. However we can both work from home throughout.
I teach, but have worked from home throughout, as I am also clinically vulnerable.
DH is a solicitor who specialises in wills and probate (private client) type work. As part of his job he also looks after some people's money and is responsible for ensuring they have some available. - this type of law is in the key worker list. He has worked from home throughout, calling into the office once a week. He can now see some of his more vulnerable clients, who can't do telephone/video calls, in person following strict guidelines. He was initially swamp with people wanting new wills, especially medics. He has since been busy, sadly, with probates.
DD is pretty much an adult so no need for school childcare. Been able to get online deliveries throughout so not used any of the special hours, etc.
The term doesn't really bother me though and I can see why we still have the distinction - we need to prioritise places in the childcare in schools, and those places need to go to those who are unable to carry out their role, in essential services, from home.