At the start of 2018, I thought I would be shipping sometimes in mid 2019. And my mistakes follows from there. 
Kinda in the same boat, but with perhaps a less luxurious timeline. I would love to put my demo out there soonish, it’s a bit late (1 year late) for me to not use preview packages.
This probably wasn’t valid feedback for Unity team, but kinda think an informal poll thread might be useful to others.
I do hope forum offers more specific tags though: Actually start using prefixes in each forums.