I imagine I am not the only one like this, but I have to go out of my way to get my car connected to Wifi. So when an update came through I had to make the effort to occasionally go check the software section of the settings and see if there was a new download.
After I got 2019.32 I was curious how it would work, and yesterday morning I had a big yellow down pointing arrow next to the sentry mode hal 9000 icon. So I made sure to go connect to Wifi and get the update.
I have no idea how many people are like me as far as their car being daily connected to wifi. But as a potential example:
New update goes out, first 100 people are given chance to download
70% connect to wifi daily
30% check every 3 days if they need to. (Im just spitballing these figures)
On day 1: 70 installs happen, (30 people have bandwidth reserved for them but aren't downloading)
On day 2: 49 installs happen (30 original still wont check for 2 days, additionally 21 new people in queue dont park in wifi. Total 51 delayed)
On day 3: 39 instant installs happen + 30 delayed people (21 from day 2 haven't checked, and 14 new people in queue with no wifi: total 35)
On day 4: 48 instant installs happen + 21 delayed people ( 14 people haven't checked and 21 new people in queue with no wifi: total 35)
so in 4 days thats 206 installs vs 400 if everyone downloaded day of
assuming the dash notification gets people excited enough to go out and download as soon as they see it this minor feature additional would double the rollout speed.
Obviously Im just making up numbers as far as case A and B but I can only assume that it was added now instead of in v10 inself because they wanted to make sure an upcoming rollout happened as fast as possible.