The post by ClixPix in this thread raises the question: if we are using a computer solely (or most of the time) for photo editing and cataloguing, is there any point in staying on the OS upgrade treadmill? I use an iMac running Sierra for those functions, but keep a slimmed down catalogue on my aged workhorse MacBook Pro running El Capitan. The photo software is Capture One Pro, the pre-PhotoLab NIK suite, and Affinity Photo, all of which run perfectly well on both machines, so why "upgrade" to Mojave, get caught up functional software compatibility upgrade queues, and have zero improvement to my photo capabilities? The key phrase in this discussion is probably "... using a computer solely (or most of the time) for photo editing and cataloguing ..." and OS upgrades that bring something useful (or desirable, which is not necessarily the same thing) for general computing could be a different thing. Mind you, having read a lot about Mojave I am totally underwhelmed; it just seems another step in the (i)ossification of MacOS.