about_them_facts on Nostr: Somebody would have to break into their LAN or Wifi to use any exploit or take ...

Somebody would have to break into their LAN or Wifi to use any exploit or take control of a BOINC project and attack it that way (or some other background service the devices uses like an update service). At that point, the fact that an attacker was able to do either of those two things is a much bigger deal than the tablet running outdated software. For most users, this is a non-risk. BOINC community is full of users using outdated hardware on their LANs without issue. To each their own though.