I've got the following iPads in my house: Original iPad, iPad 2, Mini 2, iPad 2017, Mini 4... The Mini 2 & 4 get all the work/love... I've got an iPad 2018 on the way through work, that because of the pencil might get more use... But for my wife and I, the Mini form factor is ideal for what we use it for and especially for traveling...
I'd love a Mini Pro, and would be 1st or 2nd in line for one, but I don't think it's likely... the Mini 4 runs 11 plenty well... the Mini 2, there's a little lag, and I won't update it past 11... A Mini 5 w/ an A10 and Pencil support would be killer... IMHO
Coachingguy