node.js code can cripple your system way more. So this does not really seem surprising.
I exaggerate, but only slightly.
Compiling our front end assets takes longer and more CPU than our entire back end with many multiples the amount of source code.
To add to this the Node ecosystem seems somehow to encourage outsourcing extremely simple pieces of functionality (leftpad anyone?) so you end up including a bunch of crap that you don't really need, all because someone didn't feel like using 10 lines to reimplement something simple.
Endless dependency graphs and single-function modules and left-pads weren't a problem back in the days of JQuery and sane libraries. None of this madness is necessary. No, not even for front-end frameworks. It's unnecessary in the vast majority of cases.
If they don't trust Google, Microsoft, and Apple to keep Javascript in the browser sandbox-jail then they're gonna be re-inventing an awful lot of wheels ;).