Hello JKersten,
Those alerts are only for 32-bit only apps. This is not a "wait for an update" situation. If you get these alerts, you need to dump that software and find a replacement. They aren't ever going to be updated. They are dead as dead can be.
Regarding the rant, I think you are buying into social manipulation a bit too much. All the security headlines you see in the news are just clickbait. There is virtually no actual risk from any of that. Any savvy malicious developer knows that if you want root on a Mac, all you have to do is ask nicely and you'll get it 8/10 times. Why spend six months developing a CPU-level speculative instruction pipleline exploit when a simple dialog box works fine? That stuff is a big deal for Linux servers, but not for Mac notebooks or desktops.
And the manipulation comes from Apple too. There aren't any major or minor releases anymore. There haven't been for years. Apple uses continuous releases just like everyone else. Those version numbers are just marketing. All of 10.13 (not just 10.13.4) is still very much a beta release. Sierra has only been production-ready since around last june. Given High Sierra's performance so far, I don't see it being ready for production use for several months at least. It might be a good idea to skip it altogether and camp out on Sierra another year.
You should definitely be using High Sierra for your test environment, to prepare for the future. See which apps give you those alerts and start looking for replacements. That is what those alerts are for. When you deploy High Sierra around October-ish, it should be pretty smooth.
