Old habits, traditions, etc. die hard
Definition 1 of 1
Pro Tip 1/3Culture Deep-rooted
The phrase often reflects cultural aspects that persist over time and are resistant to change. 
Even with modern technology, festivals are celebrated traditionally; old traditions die hard.
Pro Tip 2/3Emotional Weight
The phrase might carry an emotional tone, suggesting a bit of nostalgia or affection for the past. 
She still bakes with her grandmother's recipes—old habits die hard.
Pro Tip 3/3Resistance to Change
It implies a person's or society's resistance to adopting new behaviors or dropping old ones. 
I know there's software for that, but I prefer pen and paper—old habits die hard.