Neither closed or open software is safer than the other in my opinion. If someone wants to find a vulnerability they will find a vulnerability. The only advantage open source maybe has that it’s harder to hide vulnerabilities for years and it’s more obvious if they don’t fix it. But personally I wouldn’t use open source just for safety reasons.

Even if you don’t buy a lottery ticket an infinite of you wins

For me it sounds like more like a PR move. It sounds like they just want people to adopt Oracle Linux because now it’s the good thing and when they’ll have the chance they’ll do the same thing. Not necessarily exactly what Red Hat (and IBM) did but something that won’t benefit the community but them. But maybe this is just my superstition or something and it won’t come to this. I hope it won’t come to this but I doubt it

I just turned off NSFW in settings. It doesn’t really remove all nsfw posts but it hides them so you have to click a button to show the nsfw post. Not the best solution overall but the best we have right now

Edit: the setting is called Hide NSFW

Maybe check if your phone is stopping apps that are in the background. If I’m not mistaken it’s an Android feature and most of the time you can disable it in settings per app. On my Huawei phone it’s Settings > Apps > the app > power usage > launch settings.

They give extended support after a Ubuntu version is EOL if you’re a subscriber. By the way there’s a free version of the subscription for personal use up to 5 devices I think, maybe more maybe less.