I work part time in an industry where this is rare. I get that sometimes things are held up and they would like to contact me. But really I love having a separate work life balance. I get stressed easily and the last thing I want is for someone from work to contact me when I'm not working and I have to quickly get my work head back on and sort something out. I like my job but I don't want to provide support for when I'm not working. They have said they won't "abuse it" but tbh I would think any call would be abuse, unless I was paid a on hold fee.
No one lives or dies with my job, I work in consultancy for web forms.