I'm 49 and would stop work tomorrow if I could definitely afford it. I probably would be OK but the thought of one-off large expenses such as moving house, a new car, house renovations etc scare me a little, and I want to make sure I'm not left short in later life (although expenditure does generally get less as you get older - care home fees not included though!)
I had a practice retirement during lockdowns as my industry closed, and I had no work for nearly 2 years. I LOVED IT. I was in the fortunate position to have some investments due to well managed inheritances so money wasn't an issue so I could enjoy it with no financial stress. Whether there is enough to last to age 100 though...that's another question.
I can happily potter for days without getting bored. I work 3 days a week now, and finding it still a little too much work and not enough play. 2 days would be plenty.
I'm on my own with no children or grandchildren to look after and I would never get a dog to walk so it is really just ME time.
Gardening, cooking nice meals, museums, visiting friends, a few short trips a year, reading, gym/swimming, theatre, exhibitions etc etc would keep me busy enough and happy.
I suggested to my IFA a couple of years ago that I stopped work between aged 50-60 to enjoy life while I was young enough (retirement is wasted on the old) and then I could go back to work aged 60 if I needed to for a few years. He laughed so hard and said I'd never go back if I stopped. I countered that I would if I HAD to.
In summary, if the financials work then do it. I would. I'm just not quite there yet with the maths.