I wasn't diving 20 years ago, so I don't have direct experience to say. But, from what I read, it seems like improvements in 20 years have been substantial.
Wetsuits are more comfy, fit better, and employ newer technologies to make them warmer for the same thickness.
Wireless Air Integration is now mature and very reliable in dive computers.
Dive computers are possibly more reliable, offer reliable wireless air integration, and definitely offer WAY better readability.
BCDs use new materials to be lighter, fit better, pack easier, and dry much more quickly (compared to integrated BCDs from 20 years ago). And maybe even give more convenient and/or more reliable weight systems.
Sidemount BCDs are vastly improved.
There are many modern fins that seem to be better than fins of 20 years ago. Whether it's a more comfy foot pocket, equal performance for lower weight, better retention (i.e. straps), or whatever. Definite improvements.
Masks? How easy was it to get a mask with custom vision correcting lenses or even gauge reader lenses 20 years ago?
Wetsuits are more comfy, fit better, and employ newer technologies to make them warmer for the same thickness.
Wireless Air Integration is now mature and very reliable in dive computers.
Dive computers are possibly more reliable, offer reliable wireless air integration, and definitely offer WAY better readability.
BCDs use new materials to be lighter, fit better, pack easier, and dry much more quickly (compared to integrated BCDs from 20 years ago). And maybe even give more convenient and/or more reliable weight systems.
Sidemount BCDs are vastly improved.
There are many modern fins that seem to be better than fins of 20 years ago. Whether it's a more comfy foot pocket, equal performance for lower weight, better retention (i.e. straps), or whatever. Definite improvements.
Masks? How easy was it to get a mask with custom vision correcting lenses or even gauge reader lenses 20 years ago?