Just as a further example, here's my flow for the bedroom TV. I appreciate that it may not be useful for a lot of folks and it may be a niche kind of node!
To flesh out a bit from what I said above, I'm using Pi Zero's with touchphats on them for our TV in the bedroom and the TV in our eldests room, just being able to touch a physical (but capacitive touch) switch to start it off is convenient. I suffer with insomnia due to health problems, so it's much easier & quicker for me to do this, it also means that I no longer need the normal TV remote and can control everything with the pi and the Nvidia shield remote.
This actually came about from wanting to be able to send the TV to sleep from Android TV or from Emby (to remove the need for the real tv remote), but it seems that is not possible, so when I installed node-red a few days back I realised I could implement the functionality myself using some of the TV control nodes that were available. I couldn't however find a timer that worked in the manner I needed without a whole load of extra logic, so I implemented it originally in a function node, but decided just to make the leap to a proper node to tidy some stuff up - it also proved as a learning exercise so that I could create an Emby node as well, which I've done, but I'm currently working on more functionality before I release that.
I figured it may be useful to other folks, so I'd make it available incase it was. I'm sure there are a load more use cases for a timer that works like this that don't involve a TV, maybe a sleep timer for a lamp or something.