Still surprised the 1975 titles lasted for 14 years, they must have looked horrifically dated long before 1989. No different to the 1976 Corrie titles which lasted through to 1990 though.
Yes, by today’s standards it seems a long time without any kind of update to the opening titles, yet I don’t personally think Emmerdale’s “sunset” titles looked particularly dated by the late 80s. They were quite abstract and generic, and became somewhat iconic - the final shot of the farmhouse became a “logo” of sorts, and it often appeared on holding slides, book covers, etc. Corrie’s looked more dated by comparison, not least of all because of imperfections that appeared in the film (and the fact the rest of the show filmed on
VT, so there was a noticeable change in mood/quality as the titles faded into the first scene.
Even since 1990, Corrie has had very few changes to the titles - ignoring minor tweaks and updated shots, they have only changed twice since then, in 2002 and 2010.
EastEnders still uses the same “London street map” style credits that they used from day one, with only a handful of updates, and always keeping the same rotating, panning out shot from the bend in the river. If it ain’t broken....