Javascript is a popular choice for backend development here in London, when I talk with leads about why that's the choice, it's normally something about popularity which makes it easy to hire for.
There is a longer term trade-off here when choosing Javascript, It's ecosystem (npm) I argue, has the heighest maintenance cost of any ecosystem.
These are some factors to consider when determining the maintenability cost of an ecosystem:
Any project in npm will have at least 10x the number of depenedencies compare to a similar project in a different ecosystem.
Frequence updates, lots of breaking changes, library churn.
Frequent security patches.
Give those factors, even if you only care about having the minimal security updates enables you will drawning in an update loop. (although the frequent security patches are mostly false positive or don't apply to the specific context, but we don't have a good way yet to deal with that).
Of course there are benefits to having a vibrant ecosystem, things change in a good way some times but it's good to evaluate the tech choices on these factors and compare it to the alternatives, I'm biased here but between python and golang they have a relatively healthier ecosystems.