Upgrading a 7+ year old system

I’ve had a Unifi network stack up and running for several years now – recently saw on the console that the  UniFi Security Gateway will no longer receive updates for Unifi Network which prompted me to think about upgrading.

Use case –

• 1 gig fiber
• 4 hardwired Unifi Cameras
• 3 wireless Unifi Cameras
• 49 wireless devices (multiple TVs, few computers, kids on iPads – typical home setup) + several hardwired devices (e.g. PS5, Apple TVs, etc)

Current stack:

• Unifi Secure Gateway 3P
• Unifi Switch 16 POE (150W)
• CloudKey Gen2
• Unifi AC LR (Basement Wi-Fi)
• Unifi Nano HD (Upstairs Wi-Fi)
• Unifi AC Mesh (Patio Wifi)

Was thinking about upgrading / future proofing a bit with:

• Cloud Gateway Fiber
• Network Video Recorder Instant
• 2x U7 Pro Max (to replace indoor APs)
• U7 Pro Outdoor (to replace outdoor AP)
• UniFi 5G Backup
• Pro XG 24 PoE switch

I know this is probably overkill – but I’ve always been an enthusiast, tinkerer, etc. The switch probably has me jaw dropped the most in terms of cost – given my current switch has 1gb ports – is there really any reason to upgrade? Very interested in any recommendations – I’ve been doing some research but thought gut checking with the community could be wise.