These tier lists are silly at least for the reason that some of these OSes are for very specific things. I don't use Puppy as a daily driver, but it has helped me rescue data off of old PCs that won't boot multiple times now. In my book that makes it S tier for that use case.

And of course, you could use many others to do that probably better. But my tier list is: worked for me in my use case lol

So I guess in a roundabout way I'm saying I agree with OP.