Many of them will still work on gold, the others only require a little work for the most part.
Heck we still have template modifications for the 3.0 beta template set laying around:
https://vborg.vbsupport.ru/forumdisplay.php?f=151
Even when something becomes to outdated to work with the latest version it is still useful, someone may look back at an old modification and decide to write it for the latest version.