DH and I muddle along pretty well. We play to our strengths on some things - since he retired he's surprised us both by becoming an enthusiastic and very capable cook, so he does most of the meals, including lots of breakfasts in bed for me! He also does the stuff he's traditionally always done - the garden and allotment (I hate gardening), the weekly vacuuming, dealing with the recycling and rubbish (I keep well out of that), and making practically all the hot beverages
. I clean the bathroom, do the occasional dust round
, the bed changing, the admin (accounts, buying presents, sorting out insurances and holidays etc), baking now and again, the general tidying. We share anything else, eg the laundry, any decorating, and grocery shopping - I'll do the online shop, he'll collect it, one of us will put it away. We look after the DGS together two days a week and on the odd sleepover or babysitting stint. We are both very laid back these days and do the bare minimum - I can't remember the last time we felt the need to iron anything.
If you're both fit and well, sharing the stuff that has to be done and rattling through it quickly makes sense, as it gives both of you more time to enjoy your retirement, either together and/or through your separate interests.
to all who haven't been able to achieve this, for whatever reason.