People on "older, weaker computers" are likely running a browser we also don't support (<IE10) on an Operating System we don't support, and they'll likely see a TLS error before even hitting the load balancer (we don't support SSL or TLS 1.0).
It is unlikely that there exists a subset of users with a modern enough computer to even hit our web servers that is under-powered to the point of not handling JavaScript. Our analytics definitely don't show this.