Yes, I suggested moving only the backend part the part doing repeated RPC calls into Python not rewriting the entire explorer.

The idea is:
Keep the existing frontend
Replace or supplement the backend with a Python script that periodically fetches RPC data and stores it in a local cache.
Let the frontend pull from that lightweight cache instead of making live RPC calls every time
This could eliminate the memory bloat in Node.js from repeated RPC calls and long runtimes.
If you don’t want to do that, at least make sure to run Node.js with an increased memory limit
node max-old-space-size=8192 ./bin/www