While Apple have been introducing new OS versions on an annual basis for a number of years now, the changes brought by each OS have varied, some have been significant, others less so. The next version of Mac OS, Catalina or OS 10.15 is due in October and brings some very significant changes to Mac OS, such as no longer allowing 32 bit software. Here is an IMO interesting and useful article dealing with issues which may accompany installing catalina:
macOS Catalina will be incompatible with much of your music software; here's what to know - CDM Create Digital Music
macOS Catalina, the next Mac release, dramatically tightens security and removes 32-bit compatibility. That will cause incompatibilities with music software, requiring updates. Here’s what you need to know.