Yes, those were very wonderful times. 2015 was an extremely good year for Disneyland, largely due to the 60th. I really hope they can pull off an even better one for the 70th, but they'll probably wait til the 75th to do so. Ive said this before, but if they put as much effort into the 70th as they did the 60th, I think everyone will be very pleased, as also the 60th was carried by pure nostalgia for Walt Disney. Also the wonderful decor, merch, and three new nighttime shows along with attraction updates (which we are getting now. great sign!) was incredible. I just hope they don't recycle any of the Disney 100th decor or anything else from that event.
However, I am hoping they save the 70th announcements for a smaller event. I remember the days where anniversary celebrations were announced at small events and when big expansions and new rides were announced at D23. Really hope they don't use the 70th for filler time.