Implementing HTTPS as an option for Agent-Proxy communication and Proxy-Server communication would deliver many architectural design benefits for Zabbix infrastructure. 

Benefits of being able to optionally use HTTPS for agent-proxy-server communication would include - 

• Simplified firewall rules: Using HTTPS on port 443 reduces the need for additional firewall rules or non-standard port configurations.
• Load balancing: HTTPS allows for industry-standard load balancers to distribute traffic among multiple Zabbix Proxies and Servers. e.g. nginx/haproxy
• Easier CDN integration: HTTPS simplifies integration with Content Delivery Networks like Cloudflare, enhancing security and performance and reduced attack surface for Zabbix environments.
• Improved monitoring: HTTPS traffic can be analyzed using widely available tools, streamlining the monitoring and troubleshooting process.
• Consumption efficiencies of IP address space for users running multiple servers and proxys (e.g. MSPs).