Even I have noticed it. The writing energy is slowing down a bit as I will soon be starting my fourth year in a few months.
Sometimes life gets in the way.
Personal stuff gets in the way, physical or mental, doesn't matter.
Family stuff looms large or it doesn't.
Many writers I have followed write less or not at all.
Some are writing once a week.
The craftsmanship is still there, the ability to entertain has not waned, but perhaps the desire is not sustaining.
Out of topics?
Every writer goes through feast and famine.
One must remember that writing is a form of expression that must be fanned and nurtured.
Hang in there.
We need you.