8 years of updates? Are they serious? Great news if they really commit that.
And yes it does have 3.5mm audio jack to my surprise...
The website explicitly mentions hotswappable batteries, maybe it was a bug? samsung.com/us/business/mobile/tablets/galaxy-tab-active/explore/
QuoteDual Hot-Swap batteries
Removable batteries keep you moving in the field without powering down your devices.²