Hi Iva,
I agree with most if not all the stuff you listed. I know too that you could've added much more but in the interest of space and time...
I can tell you with some authority to help answer your question at least to some extent. Seventy comes much as did sixty, except perhaps you feel even less inclined to make a public blowout over the event (as some loved ones may want to do for you). I question just who or why they want you to celebrate! You know what I mean I'm quite sure.
There is one thing I can put my finger on about reaching seventy: seventy arrived still feeling I'd just turned sixty. Go figure. A time/space thing, I'm sure.
Anyway, enjoy (as much as is feasible), and carry on, about all we can do.
T