Don't know if getting old is scary. DW and I are both 81, so I guess that qualifies us to give an opinion.
While we've both slowed down, the only thing that is really bothersome, is my own frustration with the onset of my increasing memory problems. She has become a little more frail, and what used to be 13 hours of high activity, has given way to afternoon naps.
Neither of us is much into going out to eat, except with our kids or friends, and our entertainment comes in the form of cards playing (her), and the almost daily "fun" events that are scheduled at our CCRC. We play "Trivia", and "Memories" as well as attending the once or twice a month events that are held in the main building "clubhouse". We Do associate with about 20 of the younger.. (read that "60 to 75 years olds). at "driveway" parties every week from Spring to Fall.... It's a BYOB tradition, even though DW and most of the ladies drink only flavored water, and I'm down to my single 1 1/2 oz., one to five Gin Martini.
This afternoon, we went over a few hundred pictures of our 28 years retirement, and both marveled at 1. how tall we were, and 2. the obvious level of energy... surfing at Daytona, bike riding (which I still do, but not on hills). Parties that started at 7PM, and ran until 2AM... and trips to a few dozen states as well as our one-time homes on Martha's Vineyard, and Falmouth. Some Pics of our high-top camper van and our '72 VW Westphalia. We turned on the TV, and Jeanie started watching Hallmark theater, but only lasted for about 10 minutes and fell asleep... Memories can have physical effects.
Afraid of getting older?... naw... the aches, pains, pills and discombobulation of the physical body don't outweigh the love of life. We've been through the what if's and how to handle's of whatever the future may bring. At this age, we've seen most of the downsides of being old, as well as realizing that there are only a very few of our snowbirder friends left.
By the way... the very last thing on our list is worry about money. Sure... it's possible that we could have problems that would exceed our plans, but with that, would not have changed a thing about retiring early.
Oh... one more thing... I think we laugh a lot more that most of the people we know. Life IS good.