Technically change isn't a constant. Eventually everything will stop changing, because all of the atoms will have drifted too far apart to react to each other, and the universe will just be a thin soup of everything that will never touch anything ever again. Tomorrow is Wednesday, though, so only a few more days until the weekend!
But by that point, cognition itself will be a physical impossibility, so is the the lack of change even real if there's nothing to conceptualize its truth, and thus capable of declaring: "Nothing will ever change anymore"?
I met a traveller from an antique land,
Who said—“Two vast and trunkless legs of stone
Stand in the desert. . . . Near them, on the sand,
Half sunk a shattered visage lies, whose frown,
And wrinkled lip, and sneer of cold command,
Tell that its sculptor well those passions read
Which yet survive, stamped on these lifeless things,
The hand that mocked them, and the heart that fed;
And on the pedestal, these words appear:
My name is Ozymandias, King of Kings;
Look on my Works, ye Mighty, and despair!
Nothing beside remains. Round the decay
Of that colossal Wreck, boundless and bare
The lone and level sands stretch far away.”