Update strategy advice needed [long time user with large setup]

Hey guys!
I am not quite sure if this is the best sub-forum, please move this thread if there is a better place for my topic!

I started using HA roughly 4 years ago and I started over one time around 6 month in. Roughly 1.5 years in, I moved from a RasPi to a VM but I kept most of my config, so all in all my install is 3-4 years old. HAOS is running on a VM under proxmox, on my home server and it has become quite the behemoth.

I have roughly 200 smart devices in my home, mostly ZigBee but also some ESP32 and WiFi devices. I implemented google Assistant and google cloud for TTS and lots of other services I have come to rely on.

As you can imagine it has become quite the chore to update my install every few month because of breaking changes, even though it has gotten much better over the years. I still have to fix stuff from time to time in correlation with breaking changes (just a few month ago my TTS stopped working and before that it was my garbage collection automation).

I really dont care much about new features but I dont want to miss out on security updates. I havent followed development the past year or so… is there some sort of LTS branch that focuses on security updates only or are there other recommendations that dont involve reading each changelog in detail to check if there are any breaking changes to be aware of?

I guess if there is nothing like that I will have to develop some kind of AI assisted auto updater that automatically checks updates for breaking changes, auto-applies updates that are fine, tries to auto-fix breaking changes and notifies me to check the proposed solution but imho there should be a LTS version by now.

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With online services probably LTS will not help if changes are exretnal. Maybe LTS version could be with local only integrations, but using only local integrations it is very stable now.