That's eminently possible. But a trial is free (apart from your time). And since it seems that SF8 for that scanner will run on Mojave, you could always migrate ...
I decided to give it a try, and have downloaded a demo of SF 8.8. There was a link to drivers, and the latest I found for the 7500i on that page was for MacOS 10.11 (I think this is the version I have). Then I found this on their site (note, it is NOT entirely accurate):
"Apple has ceased to support 32-bit systems. Scanners lacking 64-bit drivers are not compatible with macOS 10.14.
"For the last several years, Apple has been preparing to transition to a purely 64-bit system. In macOS 10.14, this step has been taken: 32-bit apps and drivers are no longer supported. In this new version, affected scanners will no longer function with SilverFast until their drivers are updated to support 64-bit.
"At this point in time, some scanner manufacturers only provide 32-bit drivers, which are currently not supported by macOS 10.14. We thus urgently recommend that you contact your scanner manufacturer prior to updating to macOS 10.14 in order to determine the compatibility of your device."
The inaccuracy is that 10.14 DOES actually support 32-bit software, although it complains about it; 10.15 will not support 32-bit software. Nevertheless, this gives me very little (or no) confidence that SF 8 will run with my scanner on 10.15!