I use Mojave on my laptop and the new LR seems to work just fine. It's also nice to see that there's now a profile for my beloved Voightlander 50mm f/2 APO-Lanthar.
I always try out any significant new release on the laptop before putting on the "big" machine, my desktop, formerly a 2103 Mac Pro (trashcan) and now a 2020 iMac 27." I wait a week or so, read the relevant internet stuff, like this forum, for things that might make me want to wait a bit longer. If all looks well, I go ahead.
I agree, it's evolutionary, a few nice features, nothing earth shattering. But now it's getting harder to think of improvements that would be radical. I get frustrated by folks who are unhappy with the processing tools we now have from Adobe and others. The same people who spend thousands on cameras and lenses and then don't even make a physical print are often the loudest about spending US$120 per year on some genuinely magical tools that are regularly updated. Compared to a mere decade ago, and compared to film and the darkroom, we can now produce work that was genuinely impossible in the past. I'm not an Adobe fanboy but appreciate what they've accomplished and don't see them as some sort of evil empire.
That's my opinion and I'm sticking to it.