For me personally this depends on various things. My job can be very diverse and it can be also very beneficial to get things done after 6pm. But if this starts

For me personally this depends on various things. My job can be very diverse and it can be also very beneficial to get things done after 6pm. But if this starts to get to be a regulary routine where my free time gets eaten too much, i will notify boss and customer. Boss is usually on my side. My children and wife are my top priority above anything else in this universe. I have made that extremely clear to each and everyone. I do and will not care even if their network is on fire or they lose a billion cash per hour. Bezos, Nadella and Musk themselves could be asking it, i would not care. Material and money come and go. Life is way too short for that. If the customer is reasonable, i will be reasonable. If the customer is not, screams or starts to get (passive) agressive, they will be dealt with as slow and tedious as procedures and contract(s) allow. Most customers relent fairly quickly when they notice i am not so emotionally invested as they are.