Yah I was maybe a year down the road from similar plan of action, being fond of the MB spec in general for me at this point in my life. I like to have two machines on hand that can handle an OS upgrade but I wasn't going to buy two 2017 MBs off the refurb shelf now since I have a 2009 MB and a mid-2012 MBP still hanging in there.
I had figured wait on the MB refresh if possible and then when those landed in refurb I would get 2 of them, maybe one with less storage. So now I really am rather disappointed.
Maybe I'll get one 2017 MB refurb to replace my spare the 2009 machine (still on El Cap), so my spare will at least have a newer OS, and keep an eye on the MBA line for when the mid-2012 tank finally gives it up. It's more what I'm used to anyway, having the spare be a somewhat older machine. Easier on the budget than springing for twins --even refurbs-- every five or six years.
Well it's probably a good move for Apple but I have to work now not to take the demise of the MB personally.... I was fond of the SE iPhone too!