@Jessica
Not necessarily. Apple has a really poor history of providing long term support for high-end models, e.g. latest Power Mac G5 was introduced in late 2005, but Mac OS X 10.6 released in mid 2009 had no PowerPC support at all.
They do this quite often, they support lower end MB Air models for years, but just ditch higher end MacBook Pros 🤷
@thor