Most codes for a particular brand don't change much year to year. Sometimes new functions come and go, but the basic ones typically remain the same for a long time.

As an example, I can take any remote from a 2014 Sony TV and it will operate the essential functions of a 1986 Sony TV.

Note that this may not be true for "off-brands" that source their electronics from random companies, meaning sets even of the same model year might not use the same codes.