Sadly, things probably won't ever get cheaper, but, things did used to be very affordable. When I started euphyllia you could get chunks for 15-20. Acros around 15. Zoas were around 20 for a nice rock. Heck, you could get most brains for under a hundred. The drawback is that most of them were not the really nicely colored strains we have today. (And the lighting didn't help matters much. LEDs really let the colors pop on corals these days)
It's hard to really compare equipment prices since comparing a maxi-jet to a gyre or a coralife t5 to a radion is pretty futile. Technology has come a long way and tbf you get alot more when you buy a pump, light, or powered these days. Many are controllable (most even remotely), more energy efficient, and more customizable. Things back when I started were one setting and AC powered. They were bulletproof and will outlast most modern equipment, but they also didn't replicate natural conditions as well as modern equipment (except Halides. Still don't think LEDs will ever replicate the sun as well as halides, but they were horrifically inefficient and heated the tanks immensely. The bulbs were always one of the bigger costs at around 100/bulb annually on top of the much higher energy consumption)
The hobby has definitely gotten much more expensive, but it's also become much more mainstream and that's driven demands. I remember 20 dollars for small yellow Tangs and 30 dollars for a softball sized rock of palys, but I think we're at a better and more sustainable place in the hobby right now so I'm ok with it.