I hope not !
BTW QlikView 12.20SR1 was released in Dec 2017, while it patched the November 2017 IR.
The names have changed though. No more Service Releases (except in the IDs). they are called "Patch NNNNNNNNN" now.
No idea about the rate/cadence. If they follow Agile sprints, I would guess "one every 6 weeks" or something?