Maybe OT, but I thought for a long time that "follow" was some sophisticated file descriptor trickery that required you to somehow "stream" the file while reading and would therefore be incompatible with opening a file "normally".

My mind was blown when finding out its really just "keep on polling after EOF". Meaning there is absolutely no difference between opening a file normally and "following" a file - and software could easily switch between the two "modes" on the fly.