In addition to things mentioned, wetsuits are much different. The currently available material is a blended Neoprene that is more supple, stretchy, lighter weight, and less expensive than the Rubatex based suits available then. Unfortunately, they also compress a good deal more so you will be much colder at depth, though warmer at the surface. I estimate that my new 7mm suit at 50' is about as warm as my old ¼" Rubatex suit was at 150'. This is one of the reasons that drysuits have gained so much market share and people are willing to pay so much for them.
Compared to 1985, BCs are more evolved. There are a lot of wing style units in use now, though jacket BCs still dominate. You may also notice a tendency towards steel tanks larger than 80 Ft³. It is becoming increasingly rare to find people who can read decompression tables and depend entirely on their computers.