I think it's very hard, and likely to cause problems unless you sit down together and budget.
I used to work full time, have a good bonus, pension etc totalling about £100K.
After DS2 I was made redundant and took the payout (which was about equiv to 2 years pay) and decided that I didn't want to go back to full time work as our youngest would be starting school soon etc etc.
Previously DH & I had split everything totally equally - each with separate personal accounts, but then transferring an equal amount into the joint account every month.
I started doing some part time freelance work, but was only earning about a 1/4 of what I did previously, but DH didn't seem to understand (or chose to ignore) the fact that I could no longer put £2k a month into the joint account. I was dipping into my redundancy/ savings, which wasn't a good thing, as we'd agreed we would try to put that aside, and it really meant we were living beyond our means anyway.
I found it very hard to feel I could spend any money on myself, as I didn't feel I was earning it.
We had a few arguments at various points and have now reduced the amount I contribute to the joint 'family expenses'.
The other thing that has changed is that I now use our joint account card for everything which is family related, whereas previously I would often buy e.g. kids toys and clothes on my own credit card. I don't do that now.
I know people will think it's strange to still have my/ DH's accounts when we're married, but when you've been earning for 15 years or soemthing it's hard to suddenly lose that independence.
I still find myself justifying my decision by telling myself that if I had to employ someone to do what I do at home/ with the kids then that would cost the difference between what I now earn, and what I used to earn, so in 'real' terms we are no worse off.