That’s completely insecure. Even if it didn’t run well, and it does, you shouldn’t be running any computing device with outdated software.I've got an iPad Air 2 running iOS 12.4.1 and I don't know if it worth upgrading to iPadOS 14 performance wise and battery wise
I never had real issues with 13. I think it was buggier at first but just reboot it from time to time.13 was a major crash fest on 13 on all versions even with a clean install. On 14, it hasnt crashed yet in weeks of using it. UNless you want the revamped multi tasking features, I’d stay on 12 as IMO, ran the best.
That being said, 14 runs pretty good enough and I have no issues with it aside from minor bugs like iMessage input lag (which hasnt popped up these days after resetting the keyboard dictionary)
iOS is so locked down so it's less of an issue. Heck, even the vast majority of androids are doing ok and those lose support after a year or so. OP is savvy enough to ask on macrumors whether they should upgrade so they likely have the common sense to not go on sketchy sites and use adblock for all other sites - let's be honest, a lot of the nasty stuff on legit sites come from ads.I never had real issues with 13. I think it was buggier at first but just reboot it from time to time.
the options though are update the OS, or toss the iPad and buy something new. Using old software on an internet connected device is just demanding you be compromised.