Is creating thumbnails necessary?
I installed Immich on a Synology and I'm in the testing phase. My external library is 800 GB with 156 000 files. My docker container was started yesterday and is at 42 GB with 165 000 files and counting. I assume that's all the thumbnails. But why is it really creating those? Can't it behave like in Windows when you open a photos folder and it generates temp thumbnails on the fly (if that's really what's happening)? I'm just trying to make sense of all this. 
