Macrium started noting this recently. If you look at the full release history here
, you'll see a note to that effect under the heading for 7.2.3897 and 7.2.3858, for example. But maybe they forgot to note that on the newest release? The other possible issue I can see is that the reboot requirement might vary both depending on which Reflect components you installed on your system and the release you're updating from. For example, the CBT and Macrium Image Guardian components both involve drivers, so if those need to be updated, then a reboot requirement is likely. However, not everyone has those components installed. And even if you do, consider a scenario where you're running Release A. Macrium posts Release B that contains a CBT update that will require a reboot, but you don't update to it. Then Macrium posts Release C that relative to Release B
only makes minor changes to other components. If you had ALREADY updated to Release B, then updating to Release C wouldn't require a reboot. But if you're still on Release A, then you don't yet have the CBT update introduced in Release B that required a reboot, so in your specific case, updating to Release C will require a reboot because that CBT update will be applied at that time.
I don't know if an installer can be designed to analyze your specific system upfront to determine in advance whether a reboot is going to be required if you choose to proceed. Although even if that were possible, that would increase the total patch time for ALL cases, unless maybe Macrium added a step where users could choose either "Proceed with the update" or "Analyze whether this will require a reboot and then let me decide", or something. I've never seen an installer that does this, though, which is what makes me wonder if it might not be feasible to do reliably.
I personally only update Reflect at times when I'd be ok rebooting my system. Most updates aren't critical anyway, and if the update IS critical, then getting that update applied is probably a good enough reason for me to reboot if needed.