I'd only reach for n8n when I have a highly custom workflow and there's no domain-specific solution that already handles that use case.
For funnel optimization specifically, I'd look for tools built by teams who live and breathe funnel optimization — they'll handle edge cases, maintain integrations, and ship improvements you'd otherwise have to build yourself.
n8n is powerful, but the maintenance burden is real. If there's a company 100% focused on your domain, let them carry that weight so you can focus on your actual business.