We've been having this debate at the company I currently work for and have decided to look at Node as an alternative for splitting out services instead of reaching for Lumen.
Obviously Node has a very high adoption rate. I guess the real question is does your team specialize more in JavaScript or PHP? Also, keep in mind that Node may require a bit more work to keep projects organized as Laravel is extremely opinionated, which I personally prefer.
I don't think JS or PHP are going anywhere anytime soon, so for me it really is just splitting hairs. I like the organization that Laravel provides. That said, it is a heavier weight framework, so at scale it may makes sense to shave time off by breaking things out to Node or go with that altogether. As I said, it really just depends on what is important to you and your team.