Interesting. I had not considered the 'collecting' side of the stash. I had also not thought about the 'boredom' factor.
I am not a serial hobbyist, I don't take something up for a couple of years and then sell it all and take up another hobby. Having said that I have several interests that all sit hand in hand with each other. My first hobby interest was (and still is) stamp collecting. I was given a stamp album and a packet or two of stamps as a Christmas present when I was about 5 years old. Collecting stamps as a child was much as you would have imagined it. today it has become very specialised concentrating on a small period of GB stamps. it takes up very little time and is more about research than buying. So I get the Collecting bit.
I also get the boredom factor, but for me, instead of starting another kit, I will do something else for a while until I get back to the model.
After deciding to come back to scale model building I have one unmade kit in my stash and a model I started about twenty years ago in a moment of enthusiasm that only lasted a few days until 'life' took over and it got shelved before it even got properly started.
I have a list of models I would like to build, but I will do the research before I buy any kits (at least that is the plan!). My main interest is military, modelling the human side of conflict, right up to the recent past and specialist vehicles all set in a snap-shot of time, a 3D photograph, if you like. I hesitate to say 'diorama' as that implies to me a bigger 'wider' view.
Maybe I could start a new trend - a virtual stash?
Ralph.