I came across this subject on another forum recently and it got me thinking about a suitable awnser to the question that was asked, as it's something that I have personally myself contemplated for a long time.
My honourest awnser is yes, this is because of the fact that I never really grew up and because of the fact that I had and still do have lifelong learning difficulties due to Autism,/Asperger's syndrome.
And yes if I could I would drop everything and l had the financial support to do this then I would fully regress permanently back to being a baby/toddler again because that was the stage in my life when I was the most happy.
And I would even look at getting a nanny/care provider to look after me during the daytime and nighttime so that I could just go back to a more simpler time in my life.
Obviously this would include wearing diapers/nappies full time and also wearing a baby suit/onzie, sleeping in a crib/cott, drinking from adult sized baby bottles and maybe playing in a playpen and having a high chair and modifying my bedroom to become my nursary including a changing table and associated supplies.
However that's all for the future and I will think more about it in the following decade's to come as at some point in my life I will have to do that anyway because of my advancing age and medical conditions/disabilities.