Many companies much larger than Eventide do not yet have support for Catalina. For example:
This stuff is not easy.
Please do not rush to upgrade to the latest shiniest thing unless either you really need it, or are confident that full support is in place.
Please do not assume people are anxious to install Catalina merely because they like shiny things. For example, Apple will be releasing security updates, and perhaps they will only install under Catalina. Other application vendors will be making highly desireable new releases, and perhaps they will only install under Catalina. Some use systems that are administered by IT staff, and they may have policies such that they only support the latest OS release.