Not so much a question as getting the word out that many users—certainly all my iDevices and MacBook as well as my wife's iDevices and several colleagues—that indexing appears stuck at the same percentage for days.
I'm a dev and connected my iPhone to my MacBook Pro and streamed logs, seeing that `searchd` is doing something—though a couple days ago it was just getting killed constantly by watchdog for being unresponsive, or at least a child `searchd` process was. I wrote a script to monitor Spotlight status for my MBP as well since Apple removed status from Settings on macOS. All have literally been stuck at the same percent for days.
Then I look at my UniFi router and see my iPad—which normally just sits around and doesn't do much—has downloaded GBs more data than is normal. Logs do make some mention of "mail" a few times, so I'm suspecting it's downloading all my mail—not just the cached 1 months I've configured—and I have over 30 years of mail available. I signed up for that when it was still HoTMaiL before Microsoft bought them.
Not only is this draining batter, but if I was still on Comcast Cable and much of my family's devices were all downloading mail (seriously, Apple, you can shard data across connected personal devices for efficiency?), we'd be going over our cap and getting charged. Some Apple customers probably will be.
Tier 2 support said Apple is aware of the problem, but they should release a patch to at least stop the problem now if indeed it is downloading all mail and, possibly, OneDrive/iCloud files. My OneDrive is also very old with almost 2 decades of photos and other documents.
I don't need Siri and Spotlight to have access to decades-old conversations. At some point, Apple, you have to stop indexing. This is getting ridiculous. I updated Monday afternoon. It's Friday evening. Enough.