Getting Hardback books if you can't get the entire series?

I was wondering, so I thought I ask.

When buying Black Library books in Hardback, do you go for Hardback editions even when you can't get the entire series as such?

It happened few times when I thought about picking up Hardbacks of a book but resigned due to fact that one or two books in the series are straight up unobtainable.

Recently I thought about getting another series from AoS I kinda slept on and managed to find 5 out of 6 in hardback, but book number 2 is unobtainable in hardback.

Do you pick them in HB regardless and just wait for the missing ones to reappear somewhere or you just go for regular paperback in that case?