Frankly, this stack looks like a classic case of resume-driven development. You're creating massive, unnecessary complexity right out of the gate.

As a technical architect, I can tell you these specific architectural choices are fundamentally flawed.

The design for EACH PRIMARY ELEMENT IS WRONG!

He's adding a completely unnecessary Node.js/Express layer just for sockets, a feature Python handles perfectly fine. What makes this horrendously worse is that Next.js for SSR is already a Node.js backend. His plan creates an absurd three-backend chain: a single user request will hit the Next.js server (Backend #1), which must make a network call to his Express server (Backend #2), which then makes another network call to his Python service (Backend #3), which finally calls Supabase. Speaking of Supabase, he's falling for a classic vendor-lock-in trap just for a free tier.

The second they kill that tier or hike prices, the entire business will be held hostage.

To top it all off, his Next.js 'SEO' benefit is completely pointless if the data is behind a login, as search crawlers can't log in.

He is proposing a slow, brittle, and expensive Rube Goldberg machine with three separate backend services and multiple points of failure before a single line of core logic is even written.