Sony updates

Usually pretty good actually. I got the security update for my XZ within weeks of it being announced and the same on the XZ Premium!
 
I remember the updates being OK on my Z3C and Z2 but now that things are monthly are they keeping up every month or are they hitting every 2-3 months, or worse?
 
I remember the updates being OK on my Z3C and Z2 but now that things are monthly are they keeping up every month or are they hitting every 2-3 months, or worse?
No idea but my xy premium received June, July, and August updates so far.
 
My phone updated to Oreo months ago and Sony seems to update monthly