[tocoder]

The absence of excitement may stem from a number of things. The first thing I would look at is mental health, which is important to personal well-being. In particular, a sedentary lifestyle is so hard on the body. Otherwise, if an older developer is relatively healthy but struggles to be excited about their field, then I would suggest changing things up. There are many ways to try out different roles that relate to tech without leaving tech entirely. Or...just do something radically different from tech.

For some people, changing their job is the answer, but for others, even a career change won't feel different. For this bunch, my hunch is that the choice of field is not what's truly bothering them. In which case, I would revisit my first point -- make self-care a priority.

I haven't directly answered the question posted by OP because I think trying to convince yourself to be excited about something leads you further from a solution that addresses the root cause.

I hope the answer I gave was not too prescriptive. There is no judgment here. Best of luck, OP.