For painting kitchen cabinets, is milk paint or chalk paint better?

Depends on what you're looking for. Milk paint as I've seen it done, shows the wood grain and chalk paint is more opaque.

Chalk paint will eventually wear off by the constant use of opening cabinets etc

I would use milk paint. I would think it is easier to clean.

Thank you for your input. 😊 Will I need to use a sealer clear coat on top?

Chalk paint is the easy way out. Milk paint is definitely more work but will last decades and has a beautiful patina.

Here is the difference in oil varnish and water-based poly.... https://www.youtube.com/watch?v=mlTPHr6U6sU

https://www.youtube.com/watch?v=torOAQy91q4

I prefer oil finish, we used to use Tung Oil or boiled linseed and as the piece ages it has an unmistakeble patina.

chalk