At some point, you need to act your own age lol
But it's not only for combat sports, I have friends that stopped playing soccer because making quick cuts and accelerations on grass isn't that good for old joints.
Same thing with hockey, at some point you need to stop playing super competitive with checking and all that stuff
BJJ is super soft for older people, you can learn, you can get better, you can compete and work hard in the gym. With some proper S&C on the side, you can do this for years and make young people a run for their money.
Being 40 and giving a run for their money to 25 years old blue belts, even physically, is the joy of my life